To find the percent of a discount,

a. find the percent of decrease from the original price to the new price.
b. find the percent of increase from the new price to the original price.
c. multiply the original price by the new price.
d. divide the new price by the original price.

The correct and best answer would be letter B. To find the percent of a discount, you have to find or solve for the percent of increase from the new price to the original price. This is because you usually have the new price being given to you so you compare it with the old price to know the percent discount.