A trader bought a car at 30% discount on its original price. He sold it at a 70% 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) 12 %
D) 32 %
E) 19 %

Rationale: "original price = 100 cp = 70 s = 70 * ( 170 / 100 ) = 119 100 - 119 = 19 % answer : e"
Answer: E