By selling 12 pens for a rupee a woman loses 20%. How many for a rupee should he sell in order to gain 20%?
Choose the correct choice from the following options.
A) 12 B) 14 C) 45 D) 8 E) 65
8   80% --- 12   120% --- ?     80/120 * 12= 
<gadget id="calculator">  80/120 * 12</gadget>
<output>8</output>
8
<result>D</result>
By selling 12 pens for a rupee a woman loses 20%. How many for a rupee should he sell in order to gain 20%?