If the selling price of 100 articles is equal to the cost price of 40 articles, then the loss or gain percent is: Choices
A) 25 %
B) 40 %
C) 60 %
D) 65 %
E) 50 %

Rationale: let c . p . of each article be re . 1 . then , c . p . of 100 articles = rs . 100 ; s . p . of 100 articles = rs . 40 . loss % = 60 / 100 * 100 = 60 % answer : c
Answer: C