Question

The salary of an officer is increased by 25%.By what percent should the new salary be decreases to restore the original salary

Answer 1

x=100
x+25%=125
125-100=25
25 is 20%of new salary

Answer 2

Let the original salary of an officer = ₹ 100

Salary increased of the officer = 25 %

New salary = 25 % of 100 + 100

New salary = (25 × 100)÷100 + 100

New salary = 2500 ÷ 100 + 100

New salary = 25 + 100

New salary = 125

Now x % of 125 = 25

(x × 100) ÷ 125 = 25

125x ÷ 100 = 25

x = (25 × 100) ÷ 125

x = 2500 ÷ 125

x = 20 %