{"comment":{"created_at":"2011-10-09T04:29:08Z","body":"User calculation error.","updated_at":"2011-10-09T04:29:08Z","url":"https://api.github.com/repos/Khan/khan-exercises/issues/comments/2335216","id":2335216,"user":{"avatar_url":"https://secure.gravatar.com/avatar/d7f4050f2e6a008771141d23b7128b64?d=https://a248.e.akamai.net/assets.github.com%2Fimages%2Fgravatars%2Fgravatar-140.png","url":"https://api.github.com/users/richard-to","id":539889,"login":"richard-to"}},"action":"created","issue":{"number":4043,"created_at":"2011-10-09T04:08:09Z","pull_request":{"diff_url":null,"patch_url":null,"html_url":null},"body":"-8/7 - 2/4 = -46/28 - marked wrong = simplify;  4/9 + 5/2 = 53/18 when I simplified to 2 14/18 or 2 7/9 both were wrong and 53/18 was right- no simplify. ???!\n\n[adding_and_subtracting_fractions.html?seed=149&problem=0](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/adding_and_subtracting_fractions.html?seed=149&problem=0)\n\n    [\"-46/28\"]\n\nMozilla/5.0 (Windows NT 5.1; rv:7.0.1) Gecko/20100101 Firefox/7.0.1\n\nMathJax is loaded, ready, queue length: 0\n\n","comments":1,"title":"Adding and subtracting fractions - adding and subtracting fractions","updated_at":"2011-10-09T04:29:08Z","url":"https://api.github.com/repos/Khan/khan-exercises/issues/4043","id":1854897,"assignee":null,"milestone":null,"closed_at":null,"user":{"avatar_url":"https://secure.gravatar.com/avatar/96ea3904626fe17bec2152ee31cee0cd?d=https://a248.e.akamai.net/assets.github.com%2Fimages%2Fgravatars%2Fgravatar-140.png","url":"https://api.github.com/users/KhanBugz","id":924247,"login":"KhanBugz"},"html_url":"https://github.com/Khan/khan-exercises/issues/4043","labels":[{"name":"firefox","url":"https://api.github.com/repos/Khan/khan-exercises/labels/firefox","color":"e102d8"},{"name":"xp","url":"https://api.github.com/repos/Khan/khan-exercises/labels/xp","color":"ededed"}],"state":"open"},"legacy":{"issue_id":1854897,"comment_id":2335216}}