The cost price of an article is 64% of the marked price. Calculate the gain percent after allowing a discount of 20%?	Choose the correct answer
A) 37.5%	B) 48%	C) 50.5%	D) 52%	E) 25%
Explanation:   Let marked price = Rs. 100.   Then, C.P. = RS. 64, S.P. = Rs. 80   Gain % = 16/64 * 100= 
<gadget id="calculator">16/64 * 100</gadget>
<output>25</output>
25%.   Answer: Option 25%
<result>E</result>
The cost price of an article is 64% of the marked price. Calculate the gain percent after allowing a discount of 20%?