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Grade 7–9Common Core (CCSS) · Math: relationships and change

Interest and Percentage Points — Worksheets with Answers

Practise savings accounts, compound interest and percentage points with realistic numbers.

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Interest and percentage points · 14-16 years

Name: ____________________

Worked example

  1. The goal: work out how much money grows with interest – the interest or the new amount.
  2. Interest = capital × rate. Example: 2,000 kr in an account with 5% interest.
  3. After one year: 2,000 × 0.05 = 100 kr interest. Total: 2,100 kr.
  4. Compound interest, year two: 2,100 × 0.05 = 105 kr. Total: 2,205 kr.
  5. Check: read the question again. Does your answer give what was asked, with the right unit? Work backwards to see that it fits. ✓
Example: how to solve it
1.

Calculate: 2000 kr at 2.5 % interest per year. Interest after 1 year =

2.

The interest rate rises from 3.5 % to 3.75 %. How many percentage points is the increase?

3.

Calculate: 1000 kr at 3.5 % interest per year. Interest after 1 year =

4.

Sara saves 2000 kr at 3 % interest per year. How much is in the account after 3 years (compound interest)? Answer with the correct unit.

5.

Calculate: 2000 kr at 3.5 % annual interest, compounded annually. Value after 3 years (2 decimals) =

6.

Sara puts 500 kr in a savings account with 2.5 % interest per year. How much interest after one year? Answer with the correct unit.

7.

Calculate: 2 % → 2.5 % = ? percentage points

8.

The interest rate rises from 4 % to 4.25 %. How many percentage points is the increase?

9.

Calculate: 2 % → 3 % = ? percentage points

10.

Sara saves 5000 kr at 1.5 % interest per year. How much is in the account after 2 years (compound interest)? Answer with the correct unit.

11.

Calculate: 2 % → 2.75 % = ? percentage points

12.

The interest rate rises from 5 % to 5.75 %. How many percentage points is the increase?

13.

Calculate: 2.5 % → 4 % = ? percentage points

14.

Yusuf puts 2500 kr in a savings account with 5 % interest per year. How much interest after one year? Answer with the correct unit.

15.

Calculate: 2500 kr at 2.5 % interest per year. Interest after 1 year =

16.

Robin puts 1000 kr in a savings account with 3 % interest per year. How much interest after one year? Answer with the correct unit.

17.

Calculate: 5 % → 5.25 % = ? percentage points

18.

Omar puts 2500 kr in a savings account with 3 % interest per year. How much interest after one year? Answer with the correct unit.

19.

Calculate: 3.5 % → 4.25 % = ? percentage points

20.

The interest rate rises from 2.5 % to 3.25 %. How many percentage points is the increase?

Answer key

  1. 1. 50 kr
  2. 2. 0.25 percentage points
  3. 3. 35 kr
  4. 4. 2185.45 kr
  5. 5. 2217.44 kr
  6. 6. 12.5 kr
  7. 7. 0.5 percentage points
  8. 8. 0.25 percentage points
  9. 9. 1 percentage points
  10. 10. 5151.12 kr
  11. 11. 0.75 percentage points
  12. 12. 0.75 percentage points
  13. 13. 1.5 percentage points
  14. 14. 125 kr
  15. 15. 62.5 kr
  16. 16. 30 kr
  17. 17. 0.25 percentage points
  18. 18. 75 kr
  19. 19. 0.75 percentage points
  20. 20. 0.75 percentage points

Created with WorksheetMint

Topics on this worksheet

Areas on this sheet

  • Relationships and change · 20

Step 1 of 5

Choose an area

Your choices

Area
Percentages
Exercise type
Interest and percentage points
Age
14–16 years
Difficulty
Easy
Number of tasks
20
Task format
Mixed
Paper size
US Letter
1. Choose content
Area
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How to use the tool

  1. Choose the exercise type interest and percentage points.
  2. Pick age group 12–14 or 14–16, difficulty and calculations, word problems or a mix.
  3. Print or save as PDF. “Create new version” gives new numbers with a matching answer key.

About this generator

Understanding interest is everyday math. The sheets start with interest after one year, move on to compound interest where the growth factor is used several times, and explain the difference between percent and percentage points when an interest rate changes. Answers are rounded to two decimals in the local currency. The answer key is calculated by the website, so it always matches the tasks. No sign-up is needed and no personal data is collected.

Popular uses

  • Personal finance lessons
  • Growth factor and compound interest
  • Percent vs percentage points
  • Revision before a test

More math worksheets by topic

Frequently asked questions

How do I pick the right level?
Choose an age or grade in step 2. Start easier if the pupil is unsure – you can switch anytime and get new problems instantly.
Can I see the problems before printing?
Yes. The sheet shows exactly the problems that will print. Click New problems to swap them.
How do I include an answer key?
Turn on Answer key in the last step. It prints on its own page after the problems, with the same numbering.
What does the question mark next to a problem do?
It opens a step-by-step explanation of the method on screen. It is not printed and does not reveal the answer.
What is compound interest?
Interest is added to the balance, so next year you earn interest on the interest: value = start × (1 + p/100)ⁿ.
What is a percentage point?
The difference between two percentages: from 2 % to 3 % is 1 percentage point.

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