MathDB
Shoe Discount

Source:

June 4, 2011
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Problem Statement

Business is a little slow at Lou's Fine Shoes, so Lou decides to have a sale. On Friday, Lou increases all of Thursday's prices by 1010 percent. Over the weekend, Lou advertises the sale: "Ten percent off the listed price. Sale starts Monday." How much does a pair of shoes cost on Monday that cost 4040 dollars on Thursday?
<spanclass=latexbold>(A)</span> 36<spanclass=latexbold>(B)</span> 39.60<spanclass=latexbold>(C)</span> 40<spanclass=latexbold>(D)</span> 40.40<spanclass=latexbold>(E)</span> 44<span class='latex-bold'>(A)</span>\ 36 \qquad <span class='latex-bold'>(B)</span>\ 39.60 \qquad <span class='latex-bold'>(C)</span>\ 40 \qquad <span class='latex-bold'>(D)</span>\ 40.40 \qquad <span class='latex-bold'>(E)</span>\ 44