Khan/khan-exercises — Issue #9369: Percentage word problems 1 - Wrong answer
Author: KhanBugz
Created: 2011-12-23 12:23:55+00:00
State: open
Labels: chrome, win7, wrong-or-unclear

Reporter: mechris3@googlemail.com

Jessica has 147% more money today than she did this time last year. If Jessica has 819 dollars today, how many dollars did she have this time last year? (Round to the nearest penny.)

Let x be the amount of money that she had last year.

x+1.47x=819
2.47x=819
x=8192.47
x≈331.58

BUT

1.47*331 does NOT equal 819

[percentage_word_problems_1.html?seed=45&problem=yearly-percentages](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/percentage_word_problems_1.html?seed=45&problem=yearly-percentages&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/percentage_word_problems_1.html?seed=45&problem=yearly-percentages&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5C%22557.14%5C%22%22%2C30%5D%2C%5B%22hint-activity%22%2C%220%22%2C29%5D%2C%5B%22hint-activity%22%2C%220%22%2C36%5D%2C%5B%22hint-activity%22%2C%220%22%2C52%5D%2C%5B%22hint-activity%22%2C%220%22%2C75%5D%2C%5B%22hint-activity%22%2C%220%22%2C77%5D%5D)

["557.14"]

Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.63 Safari/535.7

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