A trader bought a car at 20% 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?  Select:
A) 18 %
B) 13 %
C) 12 %
D) 32 %
E) 44 %

Rationale: "original price = 100 cp = 80 s = 80 * ( 180 / 100 ) = 112 100 - 144 = 44 % answer : e"
Answer: E