If an electricity bill is paid before the due date, one gets a discount of 4% on the amount of the bill. By paying the bill before the due date, a person gets a reduction of Rs. 13. The amount of his electricity bill was:

Given:

Discount on bill if paid before due date = 4%

Reduction amount by paying before due date = Rs. 13

Formula Used:

Discount = (Discount Percentage × Total Bill) / 100

Calculation:

Let the amount of the electricity bill be Rs. x.

Discount = 4% of x

Reduction amount = Rs. 13

\( \text{4% of x} = 13 \)

\( \frac{4}{100} \times x = 13 \)

⇒ \( \frac{4x}{100} = 13 \)

⇒ \( 4x = 13 \times 100 \)

⇒ \( 4x = 1300 \)

⇒ \( x = \frac{1300}{4} \)

⇒ \( x = 325 \)

The amount of his electricity bill was Rs. 325.