Question

15 percent off of 2.25

Answer 1

15% off 2.25 = 0.15*2.25
thus the answer will be 0.3375

Answer 2

.85 Times 2.25 because if you do .15 times 2.25 you then have to subtract that from 2.25 so .85 times 2.25 is a short cut :)