Michael J. answered • 12/18/16

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Let length of rectangle = x + 0.5x = 1.5x

Let width of rectangle = x - 0.5x = 0.5x

Area of rectangle = (1.5x)(0.5x) = 0.75x

^{2}Area of square = x

^{2}Percent of square's area =

**[**(x^{2}- 0.75x^{2}) / x^{2}**]*** 100