UPSC CAPF Assistant Commandant Model Paper 3

Given:
A number is decreased by 37

1

2

%
Calculation:
37

1

2

% =

3

8

We take original number = 8x, thus if decreased by37

1

2

% ,number becomes 8x - 3x = 5x
Also, given new number = 250
⇒ 5x = 250
⇒ x = 50
∴ Original number = 8x = 8 × 50 = 400