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Simple interest
SI = P × R × T / 100
Where: P = principal (₹), R = rate of interest (% per year), SI = simple interest, T = time (years)
Solved example
Given: P = 7, R = 5, T = 10
Find: SI_ (simple interest)
- Formula: SI = P·R·T/100
- Substitute the values: SI = 10·5·7/100
- Result: SI = 3.5
Answer: SI_ = 3.5
Calculator
How to calculate Simple interest
- Write down the formula: SI = P × R × T / 100.
- Note the known values (P, R, T).
- Substitute them and simplify to find SI_.
- Use the calculator above to solve for any letter.
Frequently asked questions
What is the formula for Simple interest?
The formula is SI = P × R × T / 100, where P = principal (₹), R = rate of interest (% per year), SI = simple interest, T = time (years).
What is Simple interest when P = 7, R = 5, T = 10?
SI_ = 3.5. Substitute the values into SI = P × R × T / 100 and simplify.