By selling 20 pencils for a rupee a man loses 60%. How many for a rupee should he sell in order to gain 60%?
Choices:
A) 8 B) 9 C) 7 D) 6 E) 5
40% --- 20   160% --- ?     40/160 * 20= 
<gadget id="calculator">  40/160 * 20</gadget>
<output>5</output>
5   Answer: 5
<result>E</result>
By selling 20 pencils for a rupee a man loses 60%. How many for a rupee should he sell in order to gain 60%?