document.write( "Question 239340: A rectangle 's length is increased by 30% and its width is decreased by 30%. How much does its area change ? \n" ); document.write( "

Algebra.Com's Answer #175730 by vleith(2983) $\"\"$ $\"About$

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$\"AreaOfrectangle+=+Length+%2A+Width\"$
\n" ); document.write( "Let L be the original Length and W be the original Width.
\n" ); document.write( "The original rectangle is then $\"Area=L%2AW+=+LW\"$
\n" ); document.write( "The new rectangle has Length= $\"1.3L\"$ and a Width= $\"0.7W\"$
\n" ); document.write( " $\"NewArea+=+1.3L+%2A+0.7W\"$ = $\"1.3%2A0.7LW\"$ = $\"0.91LW\"$
\n" ); document.write( "So the new area is 91% as large as the original (that is it is 9% smaller in area) \n" ); document.write( "

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