When a number is decreased by 25 % , it becomes 120. Find the number. In step mode
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>X - 25 % of X = 120
> X - 1/4 x X = 120
> X - X /4 = 120
> 3X /4 = 120
> X = 120 X 4/3
> X = 40 X 4
> X = 160
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