All CD’s are on sale for 20% this week. The CD is $9.99. What is the original price of the CD?

Answer 1

P-.20P= 9.99

P = 9.99/(.8)= $12.49 if the sale is a 20% discount

BUT if the sale is tell to sell at 20%, not off but 20% of the original price then

9.99 = 20% of P

.2P = 9.99

P = 9.99/,2= 5(9.99} 5 cents less than $50 = $49.95 original price

Odds are you want the first answer though, $12.49, but the way it's written suggests $49.95. Had it been that way though, the store might have advertised 80% to get more customers.