Math question

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1

<p>If the length of a rectangle is increased by 30% and the width of the same rectangle is decreased by 30%, what is the effect on the area of the rectangle?</p>

<p>A - It is increased by 60%
B - It is increased by 30%
C - It is unchanged
D - It is decreased by 15%
E - It is decreased by 9% </p>

<p>The answer is E, which I'm having trouble understanding. When I work it out, the original area of xy becomes .91xy (x = length and y = width.) How does this show a 9% decrease?</p>

2

<p>you were just one step away! </p>

<p>1-.91 = .09 so a 9% decrease</p>

3

<p>Oh. I never knew that was the way to figure such a thing out. Ok, thanks.</p>