Martinez purchased a pair of shoes on a web site. The original price of the shoes was $75. She used a coupon code to receive a 20% discount? The website applied a 10% service fee to the discounted price. Martinez's shoes were less than the original price by what percent?

Step-by-step explanation:

The original price of the shoes was $75.

She used a coupon code to receive a 20% discount. The value of the discount would be

20/100 * 75 = 0.2 * 75 = 15

The discounted price of the shoe with the applied coupon would be

75 - 15 = $60

The website applied a 10% service fee to the discounted price. The value of the service charge on the discounted price would be

10/100 * 60 = 0.1 * 60 = 6

The final price of the shoe would be

60 + 6 = $66

The difference between the price paid by martinez and the original price is 75 - 66 = 9

The percentage by which it was lesser than the original price would be

9/75 * 100 = 12%