37.	If the cost price of 15 tables be equal to the selling price of 20 tables, the loss per cent is ? Choose the correct choice from the following:
A) 20 %
B) 30 %
C) 25 %
D) 37.5 %
E) 38 %

Rationale: let c . p . of each table = re . 1 c . p . of 20 tables = rs . 20 s . p . of 20 table = c . p . of 15 tables = rs . 15 loss = ( 5 / 20 ) x 100 % = 25 % answer : c
Answer: C