the length of a rectangle is increased by 30 percent and the width is decrease by the same percent. What is the percentage change in area?
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9%
Step-by-step explanation:
new l=l+30/100l
=l+3/10l
=13/10l
new w=w-30/100
=w-3/10w
=7/10w
% change in area= {(lw)-(13/10l×7/10w)}×100
={(1)-(91/100)}×100
={(100-91)/100}×100
=9/100×100
=9%
l=length
w=width
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