A trader bought a car at 20% discount on its original price. He sold it at a 100% increase on the price he bought it. What percent of profit did he make on the original price?	Choose the correct choice from the following answers.
A) 18 %  B) 13 %  C) 60 %  D) 40 %  E) 15 %

Rationale: "original price = 100 cp = 80 s = 80 * ( 200 / 100 ) = 160 100 - 160 = 60 % answer : c"
Answer: C