Question

If the price of a book is first decreased by 25% and then increased by 20%, the net change in the price
ofthe book is
a) 10% decrease b) 5% decrease c) no change
d) 5% increase​

Answer 1

Given:

If the price of a book is first decreased by 25% and then increased by 20%.

To find:

The net change in the price will be?

Solution:

Let the price of the book is 100

First, decreased by 25%

=> 100 x 25/100 = 25

=> 100 - 25

=> 75

Then, increased by 20%

=> 75 x 20/100 = 15

=> 75 + 15

=> 90

Net change is => 100 - 90 = 10% decrease

Hence, Option(A) - 10% is the required answer.