if the price of a book is first decreased by 25% and then increased by 20%, then the net change in the price will be :	Choose the correct option.
A) 10  B) 388  C) 37  D) 29  E) 22

Rationale: "explanation : let the original price be rs . 100 . new final price = 120 % of ( 75 % of rs . 100 ) = rs . ( 120 / 100 * 75 / 100 * 100 ) = rs . 90 . decrease = 10 % answer : a ) 10"
Answer: A