Khan/khan-exercises — pull request #12406 by clkirby1 (2012-01-29 19:58:23+00:00)
Title: Fix for issue #11975: validation of percents

Conversion of decimals such as .89 accepts 8.9% or .89% This occurs only with whole percents, not fractional percents. see ```282e4d4```

http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/converting_decimals_to_percents.html?debug&problem=0&seed=255158388