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?	Choose the correct choice from the following choices:
A) 82 %	B) 52 %	C) 12 %	D) 19 %	E) 22 %
<gadget id="calculator">100 - 20</gadget>
<output>80</output>

<gadget id="calculator">100 + 40</gadget>
<output>140</output>

<gadget id="calculator">80 * 140</gadget>
<output>11_200</output>

<gadget id="calculator">11_200 / 100</gadget>
<output>112</output>

<gadget id="calculator">112 / 100</gadget>
<output>28/25 = around 1.12</output>

<gadget id="calculator">(28/25) - 1</gadget>
<output>3/25 = around 0.12</output>

<gadget id="calculator">(3/25) * 100</gadget>
<output>12</output>

<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?
multiply(subtract(divide(divide(multiply(subtract(const_100, 20), add(const_100, 40)), const_100), const_100), const_1), const_100)
"original price = 100 cp = 80 s = 80 * ( 140 / 100 ) = 112 100 - 112 = 12 % answer : c"