Khan/khan-exercises — Issue #9368: Percentage word problems 1 - Wrong answer
Author: KhanBugz
Created: 2011-12-23 12:09:23+00:00
State: open
Labels: chrome, win7, wrong-or-unclear

Reporter: mechris3@googlemail.com

Luis has 77 dollars in the bank today. Yesterday, he had 223 dollars in the bank. By what percentage did Luis's bank account decrease over the past day? (Round your answer to the nearest hundredth of a percent.)

Answer: The bank account decreased by 223−77=146 dollars

This is clearly wrong. 146 dollars is not a percentage, it is an absolute number.

[percentage_word_problems_1.html?seed=123&problem=bank-percentages-loss](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/percentage_word_problems_1.html?seed=123&problem=bank-percentages-loss&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/percentage_word_problems_1.html?seed=123&problem=bank-percentages-loss&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5C%2234.53%5C%22%22%2C70%5D%2C%5B%22incorrect-activity%22%2C%22%5C%22289.61%5C%22%22%2C32%5D%2C%5B%22incorrect-activity%22%2C%22%5C%2234.52%5C%22%22%2C33%5D%2C%5B%22hint-activity%22%2C%220%22%2C1%5D%5D)

["34.53","289.61","34.52"]

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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