SOLUTION: if the length of a rectangle is increased by 30% and the width is decreased by 20%, then the area is increased by what percents?

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Question 467309: if the length of a rectangle is increased by 30% and the width is decreased by 20%, then the area is increased by what percents?
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
Sorry about this idiot
:
if the length of a rectangle is increased by 30% and the width is decreased by 20%, then the area is increased by what percents?
:
Let the original are = LW
:
new area would be:
1.3L * .8W = 1.04LW
:
1.04LW - 1LW = .04LW * 100 = 4% increase in area