Mathematics

Simple Interest

Calculate simple interest on a principal amount.

SI = (P × R × T) / 100

Formula Explanation

Simple interest is calculated on the original principal for the entire period.

Variables Explained

P = Principal; R = Annual interest rate in percent; T = Time in years.

Solved Example

Find SI on ₹5,000 at 8% per annum for 2 years.
SI = (5000 × 8 × 2) / 100 = ₹800.

Exam Tip

Convert months into years before applying the formula.