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