A trader bought a car at 20% discount on its original price. He sold it at a 40% increase on the price he bought it. What percent of profit did he make on the original price?  Select the correct option:
A) 17%  B) 62%  C) 12%  D) 8%  E) 22%
Original price = 100   12%P = 80   S = 80*(140/100)= 
<gadget id="calculator">80*(140/100)</gadget>
<output>112</output>
112   100 - 112= 12%   Answer:12%
<result>C</result>
A trader bought a car at 20% discount on its original price. He sold it at a 40% increase on the price he bought it. What percent of profit did he make on the original price?