Index: simplestyle.py
===================================================================
--- simplestyle.py	(revision 20207)
+++ simplestyle.py	(working copy)
@@ -199,7 +199,7 @@
         if len(numbers) == 3:
             for num in numbers:
                 if num.endswith(r'%'):
-                    converted_numbers.append( int(int(num[0:-1])*255/100))
+                    converted_numbers.append( int(float(num[0:-1])*255/100))
                 else:
                     converted_numbers.append(int(num))
             return tuple(converted_numbers)