Wrong percent value for 53%

[smatsudajp]

When max is 100 (default) and progress is 53, drawTextContent() writes "52%" rather than the expected "53%".
int percent = (int) (((float) progress / (float) max) * 100);
Seems like 53.0 / 100.0 results in 0.5299...
The same issue for 59%.
Suggestions:
(1) Check if max is 100, and if so, use progress as percent -- this must be very safe
(2) Add 0.5 before casting to int -- this might not be safe. Which do we want when, for example, progress is 2 and max is 30, 6% or 7%?