A trader bought a car at 10% 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?	Options:  A) 17 %  B) 62 %  C) 12 %  D) 19 %  E) 22 %

Rationale: "original price = 100 cp = 90 s = 90 * ( 180 / 100 ) = 162 100 - 162 = 62 % answer : b"
Answer: B