Question

The price of a refrigerator is increased by 25%.
By what percent should the price of the refrigerator
be decreased to bring it back to the original price?
(A) 25%
(B) 20%
(C) 162/3% (D) 13/3%​

Answer 1

Answer:

20%

Step-by-step explanation:

Let the initial price be 4a. When it is increased by 25%,

new price is 4a + 25% of 4a

= 4a + (25/100) x 4a = 5a

Let 5a should be decreased by 'b%' to make it 4a again.

=> 5a - (b% of 5a) = 4a

=> 5a - 4a = b% x 5a

=> a = (b/100) x 5a {b% = b/100}

=> (100 x a)/5a = b

=> 20 = b

Hence, it should be decreased by 20%