PSAT Math Multiple-Choice Question 659: Answer and Explanation

Question: 659

If a store has a sale in which all prices are discounted by two-thirds and also distributes coupons that take an additional 20 percent off the price, what is the fraction of the original price that a customer using a coupon would pay during the store's sale?

• A.
• B.
• C.
• D.

Correct Answer: C

Explanation:

(C) If prices are discounted by , that means you're still paying of the original price. If you also have a coupon that discounts 20%, you're still paying 80% of that price. Since the sale price is of the original price, the price with the coupon is 80% of of the original price. The fraction (or if that makes more sense to you) can represent 80%. So we can find 80% of :

Choice (C) is the answer.