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how to find the original amount after a percentage decrease. 20 percent of 500 is 100 so the discounted price is 500 - 100 or 400. For instance if the original price was 500 and you receive a 20 percent discount your equation would look like this.
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Calculating Original Price From Discounted Price. Multiply 0213 by 100 to get 213 percent. Bob sold his watch for 750 after marking it up by 50.
500 - 500 x 20 percent discounted price.
Calculating the original number after a percentage increase. This is another method of finding the original price of an item in which you know the sale price and the percentage of the original price that is discounted. You will generally use the percent change calculation when the order of the numbers does matter. To find the increase or decrease multiply the rate by the original amount x.
