Khan/khan-exercises — Issue #10853: Subtracting fractions with common denominators - right anwswer shows it worng
Author: KhanBugz
Created: 2012-01-10 16:31:51+00:00
State: open
Labels: firefox, win7, wrong-or-unclear

i will type the answer and it will tell me its wrong when i have checked it 5 times and its still right

[subtracting_fractions_with_common_denominators.html?seed=93&problem=0](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/subtracting_fractions_with_common_denominators.html?seed=93&problem=0&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/subtracting_fractions_with_common_denominators.html?seed=93&problem=0&debug&activity=%5B%5B%22correct-activity%22%2C%22%5C%223%2F18%5C%22%22%2C13%5D%5D)

["3/18"]

Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2.18) Gecko/20110614 Firefox/3.6.18

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