diff --git a/lecture7.html b/lecture7.html
index 14798c1..53edea8 100644
--- a/lecture7.html
+++ b/lecture7.html
@@ -128,7 +128,7 @@ <h1>Definitions</h1>
         <ul>
           <li>probability that a service is operational at a particular time</li>
           <ul>
-            <li>e.g., 99.9987% availability &ndash; downtime ~44 seconds/year</li>
+            <li>e.g., 99.9987% availability &ndash; downtime ~410 seconds/year</li>
           </ul>
         </ul>
         <li>SLA &ndash; Service Level Agreement</li>