The cost price of an article is 64% of the marked price. Calculate the gain percent after allowing a discount of 18%? Choose the correct answer:	A) 37.5%	B) 48%	C) 50.5%	D) 28.125%	E) 56%
Explanation:   Let marked price = Rs. 100.   Then, C.P. = RS. 64, S.P. = Rs. 82   Gain % = 18/64 * 100= 
<gadget id="calculator">18/64 * 100</gadget>
<output>225/8 = around 28.125</output>
28.125%.   Answer: Option 28.125%
<result>D</result>
The cost price of an article is 64% of the marked price. Calculate the gain percent after allowing a discount of 18%?