Question

a backpack that normally sells for $39 is on sell for 33% off. find the amount of the discount and the sale price.

Answer 1

39 : 100 * 33 = 12.87$ (amount of the discount)
39 - 12.87 =  26.13$     (the sale price)

Answer 2

39 : 100 * 33 = 12.87$ (amount of the discount)

39 - 12.87 =  26.13$     (the sale price)

Thats what my teacher said.