Rule: Divide new price by old price. Multiply by 100% a. If this is less than 100%, subtract from 100% and this is the percent markdown. b. If this is greater than 100%, subtract 100% from it and this is the percent markup. New price ÷ old price = 17278÷16300 = 1.06 change to 106% This is greater than 100%, so subtract 100% from it and this is the percent markup. Edwin