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The lengths of two opposite sides of a square are decreased by $40\%$ while the lengths of the other two sides are increased by $50\%$ to form a rectangle. By what percent does the square's area decrease?

 Mar 25, 2020
 #1
avatar+1948 
+1

Hint:

 

In this case, create side lengths for the square and test it out!

 Mar 25, 2020

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