Khan/khan-exercises — Issue #14419: Discount tax and tip word problems - Rounding error
Author: KhanBugz
Created: 2012-02-22 17:41:07+00:00
State: open
Labels: lion, safari, wrong-or-unclear

Reporter: iley1@yahoo.com

The problem states:

"If the sales tax in your city is 11.5%, how much tax would you pay for an item that costs $189.00? Round to the nearest cent."

My calculation goes as follows:
0.115 x $189.00 = $21.735, which when rounded to the nearest cent is $21.74

However I was told this is wrong, and the help examples states:
.115 x $189.00 = $21.73
You would pay $21.73 in sales tax.
which seems wrong.

[discount_tax_and_tip_word_problems.html?seed=98&problem=simple-tax](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/discount_tax_and_tip_word_problems.html?seed=98&problem=simple-tax&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/discount_tax_and_tip_word_problems.html?seed=98&problem=simple-tax&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5C%22%2421.74%5C%22%22%2C22%5D%2C%5B%22hint-activity%22%2C%220%22%2C37%5D%2C%5B%22hint-activity%22%2C%220%22%2C39%5D%2C%5B%22hint-activity%22%2C%220%22%2C44%5D%2C%5B%22correct-activity%22%2C%22%5C%22%2421.73%5C%22%22%2C165%5D%5D)

["$21.74","$21.73"]

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