By selling 16 pencils for a rupee a man loses 10%. How many for a rupee should he sell in order to gain 20%?  Options:	A) 8	B) 9	C) 12	D) 89	E) 81
90% --- 16   120% --- ?     90/120 * 16= 
<gadget id="calculator">  90/120 * 16</gadget>
<output>12</output>
12   Answer: 12
<result>C</result>
By selling 16 pencils for a rupee a man loses 10%. How many for a rupee should he sell in order to gain 20%?