If the selling price of 50 articles is equal to the cost price of 30 articles, then the loss or gain percent is:	Select the correct option
A) 40% B) 23% C) 20% D) 60% E) 56%
C.P. of each article be Re. 1.   Then, C.P. of 50 articles = Rs. 50;   S.P. of 50 articles = Rs. 30.   Loss % = 20/50 * 100= 
<gadget id="calculator">20/50 * 100</gadget>
<output>40</output>
40%   40%NSWER 40%
<result>A</result>
If the selling price of 50 articles is equal to the cost price of 30 articles, then the loss or gain percent is: