A boy bought a pen at 40% 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) 10%	B) 8%	C) 6%	D) 2%	E) 4%
Original price = 100   CP = 60   S = 60*(170/100)= 
<gadget id="calculator">60*(170/100)</gadget>
<output>102</output>
102   100 - 102= 2%   Answer: 2%
<result>D</result>
A boy bought a pen at 40% 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?