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2009 AMC 8 Problems/Problem 8

Revision as of 12:18, 14 August 2011 by Mrdavid445 (talk | contribs) (Created page with "The length of a rectangle is increased by <math> 10%</math> and the width is decreased by <math> 10%</math>. What percent of the old area is the new area? <math> \textbf{(A)}\ ...")
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The length of a rectangle is increased by $10%$ (Error compiling LaTeX. Unknown error_msg) and the width is decreased by $10%$ (Error compiling LaTeX. Unknown error_msg). What percent of the old area is the new area?


$\textbf{(A)}\ 90 \qquad \textbf{(B)}\ 99 \qquad \textbf{(C)}\ 100 \qquad \textbf{(D)}\ 101 \qquad \textbf{(E)}\ 110$

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