Question

a clerk receive an annual salary of rupees 3660 another year 1975 this is 20% more than his salary 1974 what was his salary 1974

Answer 1

Let salary in 1974 be X
Since this salary is 20% more than his salary 1974

So 3660 = X + (X*20)/100
3660 = (120*X)/100
X=(3660*100)/120
X=3050