The cost price of an article is 64% of the marked price. Calculate the gain percent after allowing a discount of 12%.	Choices.
A) 37.5 %  B) 38.5 %  C) 42 %  D) 27.5 %  E) none
Sol.   Let marked price = Rs. 100. Then, C.P. = Rs. 64. S.P = Rs. 88.   ∴ Gain % = [24/64 * 100= 
<gadget id="calculator">24/64 * 100</gadget>
<output>75/2 = around 37.5</output>
37.5%.   37.5 %nswer 37.5 %
<result>A</result>
The cost price of an article is 64% of the marked price. Calculate the gain percent after allowing a discount of 12%.