If the selling price of 50 articles is equal to the cost price of 40 articles, then the loss or gain percent is? Choose the correct choice from the following answers:	A) 20%	B) 80%	C) 90%	D) 22%	E) 24%
Let C.P. of each article be Re. 1.   Then, C.P. of 50 articles = Rs. 50;   S.P. of 50 articles = Rs. 40.   Loss % = 10/50 * 100= 
<gadget id="calculator">10/50 * 100</gadget>
<output>20</output>
20%.20%nswer: 20%
<result>A</result>
If the selling price of 50 articles is equal to the cost price of 40 articles, then the loss or gain percent is?