Simple Interest

Class 7–8 Maths: comparing quantities (simple interest)

Save money in a bank and watch it grow. How do the amount, the rate and the years change your interest?

Words to know

Principal
The money you put in or borrow.
Rate
The percent of the principal earned (or paid) each year.
Simple interest
P × R × T ÷ 100.
Amount
Principal + interest.

Quick check

Answer 3 questions to check what you learned.

1. Simple interest on ₹2000 at 5% for 2 years is…
2. The amount is…
3. At 10% simple interest, how many years to double your money?

Try at home

Ask an adult what interest rate a savings account gives. If you saved ₹1000 for 3 years at that rate, how much interest would you get?

Next, try a full lab