According to Question :
We have area of Rectangle =length x breadth
=b x a
Given breadth is decreased by 20% so we have new breadth =4a/5
And length is increased by 10% so new length of rectangle = 11b/10
Area of Rectangle = 4a/5 x11b/10
=44ab/50
So Area new =22ab/25
Which is less than previous one by 3/25 or 12% and it is 88% percent of previous one.
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