Question

a DVD priced $17.50 cost $18.81 after tax. what is the percent if sales tax

Answer 1

18.81-17.50 = 1.31

x/100 *17.50 = 1.31

17.50x =1.31 *100

x = 131 / 17.50

x= 7.4857 (if you need to round up = 7.5%)