A trader bought a car at 20% discount on its original price. He sold it at a 60% increase on the price he bought it. What percent of profit did he make on the original price? Pick
A) 28 %
B) 72 %
C) 12 %
D) 82 %
E) 16 %

Rationale: "original price = 100 cp = 80 s = 80 * ( 160 / 100 ) = 128 100 - 128 = 28 % answer : a"
Answer: A