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Cambridge Mathematics 9: Fractions, decimals and percentages

10 questions with solutions on the Cambridge Mathematics 9 topic: converting, percentage increase and decrease, reverse percentages, percentage change, simple interest.

Type the number or choose the right answer. When you finish, click Check answers and see the solutions.

1. 3/5 = ? %

2. Write 0.35 as a fraction in its simplest form.

3. Increase 80 by 15%.

4. Decrease 250 by 40%.

5. What percentage is 18 out of 24?

6. After a 20% increase the price is 360 denars. What was it before?

7. The price went from 50 to 65 denars. What is the percentage increase?

8. Simple interest on 2000 denars at 3% a year for 2 years?

9. Write 12.5% as a fraction.

10. Which is the smallest: 0.4, 3/8 or 41%?