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index 85e1040..ca4b9c7 100644
--- a/.gradle/buildOutputCleanup/cache.properties
+++ b/.gradle/buildOutputCleanup/cache.properties
@@ -1,2 +1,2 @@
-#Fri Oct 01 12:00:00 CEST 2021
-gradle.version=6.7
+#Mon Oct 18 10:23:24 CEST 2021
+gradle.version=7.0
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index 7d4cc48..360d3f8 100644
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index 6277cc7..c305ec0 100644
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diff --git a/.idea/BruecheWS21.iml b/.idea/BruecheWS21.iml
new file mode 100644
index 0000000..82aa626
--- /dev/null
+++ b/.idea/BruecheWS21.iml
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module external.linked.project.id="BruecheWS21" external.linked.project.path="$MODULE_DIR$" external.root.project.path="$MODULE_DIR$" external.system.id="GRADLE" external.system.module.group="org.example" external.system.module.version="1.0-SNAPSHOT" type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <excludeFolder url="file://$MODULE_DIR$/.gradle" />
+      <excludeFolder url="file://$MODULE_DIR$/build" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file
diff --git a/.idea/compiler.xml b/.idea/compiler.xml
new file mode 100644
index 0000000..659bf43
--- /dev/null
+++ b/.idea/compiler.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CompilerConfiguration">
+    <bytecodeTargetLevel target="16" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/gradle.xml b/.idea/gradle.xml
index 8d60d0e..4341618 100644
--- a/.idea/gradle.xml
+++ b/.idea/gradle.xml
@@ -1,11 +1,14 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
+  <component name="GradleMigrationSettings" migrationVersion="1" />
   <component name="GradleSettings">
     <option name="linkedExternalProjectsSettings">
       <GradleProjectSettings>
+        <option name="delegatedBuild" value="true" />
+        <option name="testRunner" value="GRADLE" />
         <option name="distributionType" value="DEFAULT_WRAPPED" />
         <option name="externalProjectPath" value="$PROJECT_DIR$" />
-        <option name="gradleHome" value="$PROJECT_DIR$/../../../../../../Program Files/Gradle/gradle-7.0" />
+        <option name="gradleJvm" value="16" />
         <option name="modules">
           <set>
             <option value="$PROJECT_DIR$" />
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index 1b578d5..496eb67 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -1,7 +1,7 @@
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 <project version="4">
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-  <component name="ProjectRootManager" version="2" languageLevel="JDK_14" default="true" project-jdk-name="14" project-jdk-type="JavaSDK">
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\ No newline at end of file
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new file mode 100644
index 0000000..2c41f2d
--- /dev/null
+++ b/.idea/modules.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/BruecheWS21.iml" filepath="$PROJECT_DIR$/.idea/BruecheWS21.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file
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new file mode 100644
index 0000000..797acea
--- /dev/null
+++ b/.idea/runConfigurations.xml
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="RunConfigurationProducerService">
+    <option name="ignoredProducers">
+      <set>
+        <option value="com.android.tools.idea.compose.preview.runconfiguration.ComposePreviewRunConfigurationProducer" />
+      </set>
+    </option>
+  </component>
+</project>
\ No newline at end of file
diff --git a/build/classes/java/main/brueche/Bruch.class b/build/classes/java/main/brueche/Bruch.class
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new file mode 100644
index 0000000..0548d6a
--- /dev/null
+++ b/build/reports/tests/test/classes/brueche.BruchTest.html
@@ -0,0 +1,98 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
+<meta http-equiv="x-ua-compatible" content="IE=edge"/>
+<title>Test results - BruchTest</title>
+<link href="../css/base-style.css" rel="stylesheet" type="text/css"/>
+<link href="../css/style.css" rel="stylesheet" type="text/css"/>
+<script src="../js/report.js" type="text/javascript"></script>
+</head>
+<body>
+<div id="content">
+<h1>BruchTest</h1>
+<div class="breadcrumbs">
+<a href="../index.html">all</a> &gt; 
+<a href="../packages/brueche.html">brueche</a> &gt; BruchTest</div>
+<div id="summary">
+<table>
+<tr>
+<td>
+<div class="summaryGroup">
+<table>
+<tr>
+<td>
+<div class="infoBox" id="tests">
+<div class="counter">1</div>
+<p>tests</p>
+</div>
+</td>
+<td>
+<div class="infoBox" id="failures">
+<div class="counter">0</div>
+<p>failures</p>
+</div>
+</td>
+<td>
+<div class="infoBox" id="ignored">
+<div class="counter">0</div>
+<p>ignored</p>
+</div>
+</td>
+<td>
+<div class="infoBox" id="duration">
+<div class="counter">0.014s</div>
+<p>duration</p>
+</div>
+</td>
+</tr>
+</table>
+</div>
+</td>
+<td>
+<div class="infoBox success" id="successRate">
+<div class="percent">100%</div>
+<p>successful</p>
+</div>
+</td>
+</tr>
+</table>
+</div>
+<div id="tabs">
+<ul class="tabLinks">
+<li>
+<a href="#tab0">Tests</a>
+</li>
+</ul>
+<div id="tab0" class="tab">
+<h2>Tests</h2>
+<table>
+<thead>
+<tr>
+<th>Test</th>
+<th>Method name</th>
+<th>Duration</th>
+<th>Result</th>
+</tr>
+</thead>
+<tr>
+<td class="success">dies ist der erste Test, mir fällt jetzt keine sinnvolle Beschreibung ein</td>
+<td class="success">testAusrechnen()</td>
+<td class="success">0.014s</td>
+<td class="success">passed</td>
+</tr>
+</table>
+</div>
+</div>
+<div id="footer">
+<p>
+<div>
+<label class="hidden" id="label-for-line-wrapping-toggle" for="line-wrapping-toggle">Wrap lines
+<input id="line-wrapping-toggle" type="checkbox" autocomplete="off"/>
+</label>
+</div>Generated by 
+<a href="http://www.gradle.org">Gradle 7.0</a> at 18.10.2021, 10:23:26</p>
+</div>
+</div>
+</body>
+</html>
diff --git a/build/reports/tests/test/css/base-style.css b/build/reports/tests/test/css/base-style.css
new file mode 100644
index 0000000..4afa73e
--- /dev/null
+++ b/build/reports/tests/test/css/base-style.css
@@ -0,0 +1,179 @@
+
+body {
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+    padding: 0;
+    font-family: sans-serif;
+    font-size: 12pt;
+}
+
+body, a, a:visited {
+    color: #303030;
+}
+
+#content {
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+}
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+    margin-bottom: 10px;
+}
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+    font-size: 80%;
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+}
+
+#footer, #footer a {
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+}
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+}
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+}
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+ul {
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+
+h1, h2, h3 {
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+}
+
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+    padding-left: 0;
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+    width: auto !important;
+    width: 800px;
+}
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+ul.tabLinks li {
+    float: left;
+    height: 100%;
+    list-style: none;
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+    margin-right: 25px;
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+}
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+div.tab table {
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+}
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+div.tab th, div.tab table {
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+}
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+div.tab td:first-child {
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+}
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new file mode 100644
index 0000000..3dc4913
--- /dev/null
+++ b/build/reports/tests/test/css/style.css
@@ -0,0 +1,84 @@
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+}
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+}
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+}
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+    text-align: center;
+}
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+    margin: 0;
+}
+
+.counter, .percent {
+    font-size: 120%;
+    font-weight: bold;
+    margin-bottom: 8px;
+}
+
+#duration {
+    width: 125px;
+}
+
+#successRate, .summaryGroup {
+    border: solid 2px #d0d0d0;
+    -moz-border-radius: 10px;
+    border-radius: 10px;
+}
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+#successRate {
+    width: 140px;
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+}
+
+#successRate .percent {
+    font-size: 180%;
+}
+
+.success, .success a {
+    color: #008000;
+}
+
+div.success, #successRate.success {
+    background-color: #bbd9bb;
+    border-color: #008000;
+}
+
+.failures, .failures a {
+    color: #b60808;
+}
+
+.skipped, .skipped a {
+    color: #c09853;
+}
+
+div.failures, #successRate.failures {
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+    border-color: #b60808;
+}
+
+ul.linkList {
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+}
+
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diff --git a/build/reports/tests/test/index.html b/build/reports/tests/test/index.html
new file mode 100644
index 0000000..06dffe6
--- /dev/null
+++ b/build/reports/tests/test/index.html
@@ -0,0 +1,133 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
+<meta http-equiv="x-ua-compatible" content="IE=edge"/>
+<title>Test results - Test Summary</title>
+<link href="css/base-style.css" rel="stylesheet" type="text/css"/>
+<link href="css/style.css" rel="stylesheet" type="text/css"/>
+<script src="js/report.js" type="text/javascript"></script>
+</head>
+<body>
+<div id="content">
+<h1>Test Summary</h1>
+<div id="summary">
+<table>
+<tr>
+<td>
+<div class="summaryGroup">
+<table>
+<tr>
+<td>
+<div class="infoBox" id="tests">
+<div class="counter">1</div>
+<p>tests</p>
+</div>
+</td>
+<td>
+<div class="infoBox" id="failures">
+<div class="counter">0</div>
+<p>failures</p>
+</div>
+</td>
+<td>
+<div class="infoBox" id="ignored">
+<div class="counter">0</div>
+<p>ignored</p>
+</div>
+</td>
+<td>
+<div class="infoBox" id="duration">
+<div class="counter">0.014s</div>
+<p>duration</p>
+</div>
+</td>
+</tr>
+</table>
+</div>
+</td>
+<td>
+<div class="infoBox success" id="successRate">
+<div class="percent">100%</div>
+<p>successful</p>
+</div>
+</td>
+</tr>
+</table>
+</div>
+<div id="tabs">
+<ul class="tabLinks">
+<li>
+<a href="#tab0">Packages</a>
+</li>
+<li>
+<a href="#tab1">Classes</a>
+</li>
+</ul>
+<div id="tab0" class="tab">
+<h2>Packages</h2>
+<table>
+<thead>
+<tr>
+<th>Package</th>
+<th>Tests</th>
+<th>Failures</th>
+<th>Ignored</th>
+<th>Duration</th>
+<th>Success rate</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td class="success">
+<a href="packages/brueche.html">brueche</a>
+</td>
+<td>1</td>
+<td>0</td>
+<td>0</td>
+<td>0.014s</td>
+<td class="success">100%</td>
+</tr>
+</tbody>
+</table>
+</div>
+<div id="tab1" class="tab">
+<h2>Classes</h2>
+<table>
+<thead>
+<tr>
+<th>Class</th>
+<th>Tests</th>
+<th>Failures</th>
+<th>Ignored</th>
+<th>Duration</th>
+<th>Success rate</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td class="success">
+<a href="classes/brueche.BruchTest.html">brueche.BruchTest</a>
+</td>
+<td>1</td>
+<td>0</td>
+<td>0</td>
+<td>0.014s</td>
+<td class="success">100%</td>
+</tr>
+</tbody>
+</table>
+</div>
+</div>
+<div id="footer">
+<p>
+<div>
+<label class="hidden" id="label-for-line-wrapping-toggle" for="line-wrapping-toggle">Wrap lines
+<input id="line-wrapping-toggle" type="checkbox" autocomplete="off"/>
+</label>
+</div>Generated by 
+<a href="http://www.gradle.org">Gradle 7.0</a> at 18.10.2021, 10:23:26</p>
+</div>
+</div>
+</body>
+</html>
diff --git a/build/reports/tests/test/js/report.js b/build/reports/tests/test/js/report.js
new file mode 100644
index 0000000..83bab4a
--- /dev/null
+++ b/build/reports/tests/test/js/report.js
@@ -0,0 +1,194 @@
+(function (window, document) {
+    "use strict";
+
+    var tabs = {};
+
+    function changeElementClass(element, classValue) {
+        if (element.getAttribute("className")) {
+            element.setAttribute("className", classValue);
+        } else {
+            element.setAttribute("class", classValue);
+        }
+    }
+
+    function getClassAttribute(element) {
+        if (element.getAttribute("className")) {
+            return element.getAttribute("className");
+        } else {
+            return element.getAttribute("class");
+        }
+    }
+
+    function addClass(element, classValue) {
+        changeElementClass(element, getClassAttribute(element) + " " + classValue);
+    }
+
+    function removeClass(element, classValue) {
+        changeElementClass(element, getClassAttribute(element).replace(classValue, ""));
+    }
+
+    function initTabs() {
+        var container = document.getElementById("tabs");
+
+        tabs.tabs = findTabs(container);
+        tabs.titles = findTitles(tabs.tabs);
+        tabs.headers = findHeaders(container);
+        tabs.select = select;
+        tabs.deselectAll = deselectAll;
+        tabs.select(0);
+
+        return true;
+    }
+
+    function getCheckBox() {
+        return document.getElementById("line-wrapping-toggle");
+    }
+
+    function getLabelForCheckBox() {
+        return document.getElementById("label-for-line-wrapping-toggle");
+    }
+
+    function findCodeBlocks() {
+        var spans = document.getElementById("tabs").getElementsByTagName("span");
+        var codeBlocks = [];
+        for (var i = 0; i < spans.length; ++i) {
+            if (spans[i].className.indexOf("code") >= 0) {
+                codeBlocks.push(spans[i]);
+            }
+        }
+        return codeBlocks;
+    }
+
+    function forAllCodeBlocks(operation) {
+        var codeBlocks = findCodeBlocks();
+
+        for (var i = 0; i < codeBlocks.length; ++i) {
+            operation(codeBlocks[i], "wrapped");
+        }
+    }
+
+    function toggleLineWrapping() {
+        var checkBox = getCheckBox();
+
+        if (checkBox.checked) {
+            forAllCodeBlocks(addClass);
+        } else {
+            forAllCodeBlocks(removeClass);
+        }
+    }
+
+    function initControls() {
+        if (findCodeBlocks().length > 0) {
+            var checkBox = getCheckBox();
+            var label = getLabelForCheckBox();
+
+            checkBox.onclick = toggleLineWrapping;
+            checkBox.checked = false;
+
+            removeClass(label, "hidden");
+         }
+    }
+
+    function switchTab() {
+        var id = this.id.substr(1);
+
+        for (var i = 0; i < tabs.tabs.length; i++) {
+            if (tabs.tabs[i].id === id) {
+                tabs.select(i);
+                break;
+            }
+        }
+
+        return false;
+    }
+
+    function select(i) {
+        this.deselectAll();
+
+        changeElementClass(this.tabs[i], "tab selected");
+        changeElementClass(this.headers[i], "selected");
+
+        while (this.headers[i].firstChild) {
+            this.headers[i].removeChild(this.headers[i].firstChild);
+        }
+
+        var h2 = document.createElement("H2");
+
+        h2.appendChild(document.createTextNode(this.titles[i]));
+        this.headers[i].appendChild(h2);
+    }
+
+    function deselectAll() {
+        for (var i = 0; i < this.tabs.length; i++) {
+            changeElementClass(this.tabs[i], "tab deselected");
+            changeElementClass(this.headers[i], "deselected");
+
+            while (this.headers[i].firstChild) {
+                this.headers[i].removeChild(this.headers[i].firstChild);
+            }
+
+            var a = document.createElement("A");
+
+            a.setAttribute("id", "ltab" + i);
+            a.setAttribute("href", "#tab" + i);
+            a.onclick = switchTab;
+            a.appendChild(document.createTextNode(this.titles[i]));
+
+            this.headers[i].appendChild(a);
+        }
+    }
+
+    function findTabs(container) {
+        return findChildElements(container, "DIV", "tab");
+    }
+
+    function findHeaders(container) {
+        var owner = findChildElements(container, "UL", "tabLinks");
+        return findChildElements(owner[0], "LI", null);
+    }
+
+    function findTitles(tabs) {
+        var titles = [];
+
+        for (var i = 0; i < tabs.length; i++) {
+            var tab = tabs[i];
+            var header = findChildElements(tab, "H2", null)[0];
+
+            header.parentNode.removeChild(header);
+
+            if (header.innerText) {
+                titles.push(header.innerText);
+            } else {
+                titles.push(header.textContent);
+            }
+        }
+
+        return titles;
+    }
+
+    function findChildElements(container, name, targetClass) {
+        var elements = [];
+        var children = container.childNodes;
+
+        for (var i = 0; i < children.length; i++) {
+            var child = children.item(i);
+
+            if (child.nodeType === 1 && child.nodeName === name) {
+                if (targetClass && child.className.indexOf(targetClass) < 0) {
+                    continue;
+                }
+
+                elements.push(child);
+            }
+        }
+
+        return elements;
+    }
+
+    // Entry point.
+
+    window.onload = function() {
+        initTabs();
+        initControls();
+    };
+} (window, window.document));
\ No newline at end of file
diff --git a/build/reports/tests/test/packages/brueche.html b/build/reports/tests/test/packages/brueche.html
new file mode 100644
index 0000000..62239cb
--- /dev/null
+++ b/build/reports/tests/test/packages/brueche.html
@@ -0,0 +1,103 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
+<meta http-equiv="x-ua-compatible" content="IE=edge"/>
+<title>Test results - Package brueche</title>
+<link href="../css/base-style.css" rel="stylesheet" type="text/css"/>
+<link href="../css/style.css" rel="stylesheet" type="text/css"/>
+<script src="../js/report.js" type="text/javascript"></script>
+</head>
+<body>
+<div id="content">
+<h1>Package brueche</h1>
+<div class="breadcrumbs">
+<a href="../index.html">all</a> &gt; brueche</div>
+<div id="summary">
+<table>
+<tr>
+<td>
+<div class="summaryGroup">
+<table>
+<tr>
+<td>
+<div class="infoBox" id="tests">
+<div class="counter">1</div>
+<p>tests</p>
+</div>
+</td>
+<td>
+<div class="infoBox" id="failures">
+<div class="counter">0</div>
+<p>failures</p>
+</div>
+</td>
+<td>
+<div class="infoBox" id="ignored">
+<div class="counter">0</div>
+<p>ignored</p>
+</div>
+</td>
+<td>
+<div class="infoBox" id="duration">
+<div class="counter">0.014s</div>
+<p>duration</p>
+</div>
+</td>
+</tr>
+</table>
+</div>
+</td>
+<td>
+<div class="infoBox success" id="successRate">
+<div class="percent">100%</div>
+<p>successful</p>
+</div>
+</td>
+</tr>
+</table>
+</div>
+<div id="tabs">
+<ul class="tabLinks">
+<li>
+<a href="#tab0">Classes</a>
+</li>
+</ul>
+<div id="tab0" class="tab">
+<h2>Classes</h2>
+<table>
+<thread>
+<tr>
+<th>Class</th>
+<th>Tests</th>
+<th>Failures</th>
+<th>Ignored</th>
+<th>Duration</th>
+<th>Success rate</th>
+</tr>
+</thread>
+<tr>
+<td class="success">
+<a href="../classes/brueche.BruchTest.html">BruchTest</a>
+</td>
+<td>1</td>
+<td>0</td>
+<td>0</td>
+<td>0.014s</td>
+<td class="success">100%</td>
+</tr>
+</table>
+</div>
+</div>
+<div id="footer">
+<p>
+<div>
+<label class="hidden" id="label-for-line-wrapping-toggle" for="line-wrapping-toggle">Wrap lines
+<input id="line-wrapping-toggle" type="checkbox" autocomplete="off"/>
+</label>
+</div>Generated by 
+<a href="http://www.gradle.org">Gradle 7.0</a> at 18.10.2021, 10:23:26</p>
+</div>
+</div>
+</body>
+</html>
diff --git a/build/test-results/test/TEST-brueche.BruchTest.xml b/build/test-results/test/TEST-brueche.BruchTest.xml
new file mode 100644
index 0000000..39eddc1
--- /dev/null
+++ b/build/test-results/test/TEST-brueche.BruchTest.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<testsuite name="brueche.BruchTest" tests="1" skipped="0" failures="0" errors="0" timestamp="2021-10-18T08:23:26" hostname="Tibors-MacBook-Pro.local" time="0.014">
+  <properties/>
+  <testcase name="dies ist der erste Test, mir fällt jetzt keine sinnvolle Beschreibung ein" classname="brueche.BruchTest" time="0.014"/>
+  <system-out><![CDATA[]]></system-out>
+  <system-err><![CDATA[]]></system-err>
+</testsuite>
diff --git a/build/test-results/test/binary/output.bin b/build/test-results/test/binary/output.bin
new file mode 100644
index 0000000..e69de29
diff --git a/build/test-results/test/binary/output.bin.idx b/build/test-results/test/binary/output.bin.idx
new file mode 100644
index 0000000..f76dd23
Binary files /dev/null and b/build/test-results/test/binary/output.bin.idx differ
diff --git a/build/test-results/test/binary/results.bin b/build/test-results/test/binary/results.bin
new file mode 100644
index 0000000..a9dc439
Binary files /dev/null and b/build/test-results/test/binary/results.bin differ
diff --git a/build/tmp/compileJava/previous-compilation-data.bin b/build/tmp/compileJava/previous-compilation-data.bin
new file mode 100644
index 0000000..a11a5ba
Binary files /dev/null and b/build/tmp/compileJava/previous-compilation-data.bin differ
diff --git a/build/tmp/compileJava/source-classes-mapping.txt b/build/tmp/compileJava/source-classes-mapping.txt
new file mode 100644
index 0000000..344f0fb
--- /dev/null
+++ b/build/tmp/compileJava/source-classes-mapping.txt
@@ -0,0 +1,2 @@
+brueche/Bruch.java
+ brueche.Bruch
diff --git a/build/tmp/compileTestJava/previous-compilation-data.bin b/build/tmp/compileTestJava/previous-compilation-data.bin
new file mode 100644
index 0000000..19a8d3c
Binary files /dev/null and b/build/tmp/compileTestJava/previous-compilation-data.bin differ
diff --git a/build/tmp/compileTestJava/source-classes-mapping.txt b/build/tmp/compileTestJava/source-classes-mapping.txt
new file mode 100644
index 0000000..446718d
--- /dev/null
+++ b/build/tmp/compileTestJava/source-classes-mapping.txt
@@ -0,0 +1,2 @@
+brueche/BruchTest.java
+ brueche.BruchTest
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index be52383..f371643 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.7-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.0-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/gradlew b/gradlew
old mode 100644
new mode 100755
diff --git a/gradlew.bat b/gradlew.bat
index 107acd3..ac1b06f 100644
--- a/gradlew.bat
+++ b/gradlew.bat
@@ -1,89 +1,89 @@
-@rem
-@rem Copyright 2015 the original author or authors.
-@rem
-@rem Licensed under the Apache License, Version 2.0 (the "License");
-@rem you may not use this file except in compliance with the License.
-@rem You may obtain a copy of the License at
-@rem
-@rem      https://www.apache.org/licenses/LICENSE-2.0
-@rem
-@rem Unless required by applicable law or agreed to in writing, software
-@rem distributed under the License is distributed on an "AS IS" BASIS,
-@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-@rem See the License for the specific language governing permissions and
-@rem limitations under the License.
-@rem
-
-@if "%DEBUG%" == "" @echo off
-@rem ##########################################################################
-@rem
-@rem  Gradle startup script for Windows
-@rem
-@rem ##########################################################################
-
-@rem Set local scope for the variables with windows NT shell
-if "%OS%"=="Windows_NT" setlocal
-
-set DIRNAME=%~dp0
-if "%DIRNAME%" == "" set DIRNAME=.
-set APP_BASE_NAME=%~n0
-set APP_HOME=%DIRNAME%
-
-@rem Resolve any "." and ".." in APP_HOME to make it shorter.
-for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
-
-@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
-
-@rem Find java.exe
-if defined JAVA_HOME goto findJavaFromJavaHome
-
-set JAVA_EXE=java.exe
-%JAVA_EXE% -version >NUL 2>&1
-if "%ERRORLEVEL%" == "0" goto execute
-
-echo.
-echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
-echo.
-echo Please set the JAVA_HOME variable in your environment to match the
-echo location of your Java installation.
-
-goto fail
-
-:findJavaFromJavaHome
-set JAVA_HOME=%JAVA_HOME:"=%
-set JAVA_EXE=%JAVA_HOME%/bin/java.exe
-
-if exist "%JAVA_EXE%" goto execute
-
-echo.
-echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
-echo.
-echo Please set the JAVA_HOME variable in your environment to match the
-echo location of your Java installation.
-
-goto fail
-
-:execute
-@rem Setup the command line
-
-set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
-
-
-@rem Execute Gradle
-"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
-
-:end
-@rem End local scope for the variables with windows NT shell
-if "%ERRORLEVEL%"=="0" goto mainEnd
-
-:fail
-rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
-rem the _cmd.exe /c_ return code!
-if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
-exit /b 1
-
-:mainEnd
-if "%OS%"=="Windows_NT" endlocal
-
-:omega
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/src/main/java/brueche/Bruch.java b/src/main/java/brueche/Bruch.java
index d16feb2..9b27d59 100644
--- a/src/main/java/brueche/Bruch.java
+++ b/src/main/java/brueche/Bruch.java
@@ -87,9 +87,10 @@ public Bruch multiplizieren(Bruch b) {
      * @return Wert des Bruchs als Gleitkommazahl (double)
      */
     public double ausrechnen() {
-        return getZaehler() / getNenner();
+        return (double) getZaehler() / getNenner();
     }
 
+
     /**
      * kürzt this
      */
diff --git a/src/test/java/brueche/BruchTest.java b/src/test/java/brueche/BruchTest.java
new file mode 100644
index 0000000..abb29a0
--- /dev/null
+++ b/src/test/java/brueche/BruchTest.java
@@ -0,0 +1,23 @@
+package brueche;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class BruchTest {
+
+    @Test
+    @DisplayName("hier wird getested, ob Gleitkommazahlen berechnet werden können")
+    void testAusrechnen(){
+
+        Bruch bruch = new Bruch(5, 2);
+        double actual = bruch.ausrechnen() ;
+        var expected = 2.5;
+
+        assertEquals(expected, actual);
+
+    }
+
+
+}