A trader bought a car at 20% discount on its original price. He sold it at a 55% increase on the price he bought it. What percent of profit did he make on the original price?
Choose the correct option.
A) 17 %	B) 24 %	C) 12 %	D) 82 %	E) 16 %

Rationale: "original price = 100 cp = 80 s = 80 * ( 155 / 100 ) = 124 100 - 124 = 24 % answer : b"
Answer: B