A number decreased by 27 1/2 % gives 87. The. number is
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Let the number be x.
x decreases by 27 1/2% to give 87
therefore
x - 27 1/2% of x = 87
x - 55/2 * 1/100 * x = 87
x - 55x/200 = 87
200x - 55x / 200 = 87
145x = 17400
x = 17400/145 = 120
Therefore the number is 120.
x decreases by 27 1/2% to give 87
therefore
x - 27 1/2% of x = 87
x - 55/2 * 1/100 * x = 87
x - 55x/200 = 87
200x - 55x / 200 = 87
145x = 17400
x = 17400/145 = 120
Therefore the number is 120.
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