If the cost price of 50 articles is equal to the selling price of 40 articles, then the gain or loss percent is?  Choose the correct choice from the following options
A) 27%	B) 65%	C) 285%	D) 245%	E) 25%
Given that, cost price of 50 article is equal to selling price of 40 articles.   Let cost price of one article = Rs. 1   Selling price of 40 articles = Rs. 50   But Cost price of 40 articles = Rs. 40   Therefore, the trader made profit.\Percentage of profit = 10/40 * 100= 
<gadget id="calculator">10/40 * 100</gadget>
<output>25</output>
25%.Answer:25%
<result>E</result>
If the cost price of 50 articles is equal to the selling price of 40 articles, then the gain or loss percent is?