Question

Nick bought a pair of glasses for $200. He later saw the same glasses advertised for 20% less than what he originally paid. What price were the glasses being advertised for? 

Answer 1

$160

.20 * 200= 40

200-40=160

Answer 2

(original-new) / original = discount

(200-new)/200 = .20

multiply by 200 on both sides

200 - new=40

subtract 200 from each side

-new = -160

multiply by -1

new = 160

the selling price is $160