AoPS Wiki:Problem of the Day/July 27, 2011

< AoPS Wiki:Problem of the Day
Revision as of 19:27, 26 July 2011 by Btilm305 (talk | contribs) (new problem)
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I can buy a 15% off coupon at a store for 10 dollars. In dollars, how much money would I have to spend to make up for money I spent on the coupon?