<PRE><B>Question 1089677</B>
Area = l * w, l is length and w is width
:
new area = (l +0.40l) * (w -0.20w) 
:
new area = lw +0.40lw -0.20lw -0.08lw
:
new area = lw +0.12lw
:
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the new area increases by 0.12 or 12%
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:
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