By selling 12 toffees for a rupee, a man loses 20%. How many for a rupee should be sell to get a gain of 20%?
Choices:	A) 2	B) 8	C) 9	D) 7	E) 6
Explanation:   Let S.P. of 12 toffees be Rs. x.   Then, 80:1 = 120:x or x = 120/180 = 3/2   For Rs. 3/2, toffees sold = 12.   For Re. 1, toffees sold = 12 * 2/3= 
<gadget id="calculator">12 * 2/3</gadget>
<output>8</output>
8   Answer:8
<result>B</result>
By selling 12 toffees for a rupee, a man loses 20%. How many for a rupee should be sell to get a gain of 20%?