Khan/khan-exercises — Issue #9483: Subtracting fractions with common denominators - correction system fail
Author: KhanBugz
Created: 2011-12-25 02:30:39+00:00
State: open
Labels: ie8, win7, wrong-or-unclear

for the problem:5/18-2/18=3/18.
i typed in 3/18 and it said its wrong.Any idea?

[subtracting_fractions_with_common_denominators.html?seed=36&problem=0](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/subtracting_fractions_with_common_denominators.html?seed=36&problem=0&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/subtracting_fractions_with_common_denominators.html?seed=36&problem=0&debug&activity=%5B%5B%22correct-activity%22%2C%22%5C%223%2F18%5C%22%22%2C5%5D%2C%5B%22correct-activity%22%2C%22%5C%223%2F18%5C%22%22%2C7%5D%2C%5B%22correct-activity%22%2C%22%5C%223%2F18%5C%22%22%2C17%5D%2C%5B%22hint-activity%22%2C%220%22%2C2%5D%2C%5B%22hint-activity%22%2C%220%22%2C8%5D%2C%5B%22hint-activity%22%2C%220%22%2C13%5D%2C%5B%22correct-activity%22%2C%22%5C%223%2F18%5C%22%22%2C26%5D%5D)

["3/18","3/18","3/18","3/18"]

Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; GTB7.2; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C)

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