A trader bought a car at 40% discount on its original price. He sold it at a 80% increase on the price he bought it. What percent of profit did he make on the original price?
Choose the correct answer.
A) 8 % B) 62 % C) 2 % D) 9 % E) 22 %

Rationale: "original price = 100 cp = 60 s = 60 * ( 180 / 100 ) = 112 100 - 108 = 8 % answer : a"
Answer: A