A trader bought a car at 10% 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? Choose the correct option.
A) 17%  B) 62%  C) 12%  D) 19%  E) 22%
Original price = 100   CP = 90   S = 90*(180/100)= 
<gadget id="calculator">90*(180/100)</gadget>
<output>162</output>
162   100 - 162= 62%   Answer: 62%
<result>B</result>
A trader bought a car at 10% 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?