Matching Pairs Percent ReviewOnline version vocabulary and formulas for test review by STEPHANIE GREGORY 1 To change a decimal to a percent 2 how to find percent error 3 how to find the percent of a number 4 simple interest formula 5 Principal 6 interest 7 how to find percent increase or percent decrease 8 To find the total after tax or gratuity 9 interest rate 10 To find the total after a disccount 11 To change a percent to a decimal I = PRT the amount of money being charged to borrow money or the amount of money earned for investing money difference/original = %/100 Multiply the cost by the percent as a decimal, then add it back to cost Multiply the cost by the percent as a decimal, the subtract that amount from the cost the amount of money being invested or the amount of money being borrowed Move the decimal two times to the left is/of = %/100 difference/actual = %/100 the % being charged for a loan or the % being earned for investing Move the decimal 2 times to the right
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