Khan/khan-exercises — Issue #11674: Arithmetic challenge - Arithmetic challenge
Author: KhanBugz
Created: 2012-01-20 03:37:17+00:00
State: open
Labels: firefox, other, xp

Reporter: snyesha72@yahoo.com

this is so messed up the question is −7/8÷8/9=? in lowest terms.!!!!!!!!!!!!!!!!!
so i took it and used kfc method keep flip change. i got -63/81 simplified it is -7/9! why is this dumb thing aggravating me saying that it is wrong !!!!!

[arithmetic_challenge.html?seed=13&problem=5 (dividing_fractions)](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/arithmetic_challenge.html?seed=13&problem=5&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/arithmetic_challenge.html?seed=13&problem=5&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5C%227%2F9%5C%22%22%2C246%5D%2C%5B%22hint-activity%22%2C%220%22%2C23%5D%2C%5B%22hint-activity%22%2C%220%22%2C24%5D%2C%5B%22hint-activity%22%2C%220%22%2C24%5D%2C%5B%22incorrect-activity%22%2C%22%5C%227%2F9%5C%22%22%2C35%5D%2C%5B%22incorrect-activity%22%2C%22%5C%22-7%2F9%5C%22%22%2C24%5D%2C%5B%22incorrect-activity%22%2C%22%5C%22-7%2F9%5C%22%22%2C7%5D%2C%5B%22incorrect-activity%22%2C%22%5C%22-63%2F81%5C%22%22%2C14%5D%2C%5B%22incorrect-activity%22%2C%22%5C%22-7%2F9%5C%22%22%2C8%5D%5D)

["7/9","7/9","-7/9","-7/9","-7/9","-63/81","-7/9"]

Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.25) Gecko/20111212 Firefox/3.6.25

MathJax is loaded, ready, queue length: 0