20% percent refers to the rate So to find 20% off of $125 you have to multiply the rate by the original price and then subtract that number from the original price First you have to make the percent into a decimal. To do that you have to move the decimal point over to the left two times or divide by 100: 20/100= .20 So the equation would be: .20 • 125= 25 Now you have to subtract from the original number: 125-25=100 So the answer would be that the stereo would cost 100 with the 20% off sale