Grade 7 · Year 8 · Class 7 · ages 12–13 · Percentages
Simple interest: Grade 7 practice
Finding simple interest from the principal, the rate and the time. Eight questions at a time, instant feedback and a mastery score from 0 to 100.
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Right answers raise your mastery score (more on harder questions) and wrong ones lower it a little. Your best score is saved on this device, and in your account if you log in.
The idea in one minute
Simple interest = principal × rate × time ÷ 100, where the rate is per year and the time is in years.
Try these on paper first
One question at each level. Tap a question to see the answer.
Easy Simple interest on ₹2,000 at 5% per year for 3 years is ₹
Answer: 300
Medium Simple interest on ₹3,000 at 6% per year for 3 years is ₹
Answer: 540
Challenge Simple interest on ₹2,900 at 3% per year for 3 years is ₹
Answer: 261
More ways to practise simple interest
- Printable simple interest worksheet with an answer key (new questions every time)
- Percent Power: Practise finding percentages of amounts and understanding percentage increase and decrease.
- All Grade 7 practice · Percentage worksheets
Related skills
- Percentage increase and decrease (Grade 7)
- Profit and loss (Grade 7)
- Discounts word problems (Grade 7)
- Compound interest for 2 years (Grade 8)
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FAQ
Simple interest: questions
What grade is simple interest?
It is usually taught in Grade 7 (Year 8 in England, Class 7 in India, ages 12–13), though schools and countries differ. Try the grade above or below if it feels too hard or too easy.
What does a simple interest question look like?
For example: "Simple interest on ₹3,000 at 6% per year for 3 years is ₹" The answer is 540. Simple interest = principal × rate × time ÷ 100, where the rate is per year and the time is in years.
What should I learn before and after simple interest?
Before it, try profit and loss (Grade 7). After it, move on to discounts word problems (Grade 7).
How can I get better at simple interest?
Simple interest = principal × rate × time ÷ 100, where the rate is per year and the time is in years. Practise a little every day, read the hint after each wrong answer, and use the printable worksheet when you want to write it out.
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