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Percent formulas

QuestionAnswer
Percent of a Number Multiply the number by the percent in decimal form
percent proportion is/of = %/100 or part/whole = percent/100
percent equation part = percent x whole or p = (n)(w)
percent of change [(new - original)/ original] x 100
Sales tax (price of item)(percent in decimal form)
Total price find sales tax and add to price or, Add the sales tax % to 100%, change to decimal form and multiply to price
discount (price of item)(percent in decimal form)
discount price Find the amount of discount then subtract from price or, subtract the discount % from 100%, turn the answer into a decimal, then multiply to the price
Created by: Mrs. Knueven
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