The shirt you want to buy is 15% off from $32.50. how much will your shirt be?

It is $27.62 you would save $4.875, you round that up to 88 and you subtract from 32.50 and thats your answer

15% off $32.50 means a reduction of 15% x 32.5 = $4.875 
And the paid cost is 32.5 - 4.875 = $27.625

Another method: the discount is 15% of te 100%, that means he will be
only 85% (100% - 15%) of the 32.5,, then the paid price will be 32.5 x 85%
 or 32.5 x 0.85 = $27.625

Letter a i would say