document.write( "Question 838225: If lenght of a rectangle is increased by 30% and the width is decreased by 20% then by what percentage the area of rectangle is increased ? \n" ); document.write( "

Algebra.Com's Answer #504949 by KMST(5328) $\"\"$ $\"About$

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$\"L\"$ = original length of the rectangle
\n" ); document.write( " $\"W\"$ = original width of the rectangle
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\n" ); document.write( "Then,
\n" ); document.write( " $\"L%2AW\"$ = original area of the rectangle
\n" ); document.write( " $\"1.3L\"$ = original length increased by 30%
\n" ); document.write( " $\"0.8W\"$ = original width decreased by 30%
\n" ); document.write( " $\"%281.3L%29%2A%280.8W%29\"$ = final area of the modified rectangle
\n" ); document.write( " $\"%281.3L%29%2A%280.8W%29=1.04%2AL%2AW\"$ = final area of the modified rectangle
\n" ); document.write( " $\"1.04%2AL%2AW-L%2AW=%281.04-1%29%2AL%2AW=0.04%2AL%2AW\"$ = area increase
\n" ); document.write( " $\"0.04%2AL%2AW%2F%28L%2AW%29=0.04=4%2F100=highlight%28%224+%25%22%29\"$ = area increase as a fraction or percent of the original area \n" ); document.write( "

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