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reverse percentage math. Divide the percentage added to the original by 100. Calculating reverse percentages Calculating reverse percentages depends on knowing that before an increase or decrease in price an item is always worth 100 of its value no matter what that value.
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So 75 really means 75100. Find a quantity before increase. Reverse percentage calculations are problems in which we are given a of an amount and we have to find the original amount. For example if a sales tax of 6 percent was added to the bill to.
