Lesson R9

R9 Percentages: change, original value and simple interest Quiz: AQA Maths, Unit 3

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson R9, Percentages: change, original value and simple interest: 20 multiple choice questions for the AQA GCSE Maths (8300), Unit 3: Ratio, proportion and rates of change, written with Revision Ninja.

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The 20 questions

  1. What is 15% of 80?

    • 15
    • 8
    • 120
    • 12

  2. Increase 200 pounds by 20%. What is the result?

    • 240 pounds
    • 40 pounds
    • 220 pounds
    • 160 pounds

  3. Decrease 500 by 12%. What is the result?

    • 512
    • 388
    • 60
    • 440

  4. After a 25% increase the price is 150 pounds. What was the original price?

    • 120 pounds
    • 187.50 pounds
    • 125 pounds
    • 137.50 pounds

  5. A value increases from 40 to 52. What is the percentage change?

    • 130%
    • 30%
    • 23%
    • 12%

  6. A value falls from 80 to 60. What is the percentage decrease?

    • 33%
    • 25%
    • 20%
    • 75%

  7. Find the simple interest on 500 pounds at 4% per year for 3 years.

    • 60 pounds
    • 20 pounds
    • 120 pounds
    • 540 pounds

  8. Express 0.37 as a percentage.

    • 370%
    • 3.7%
    • 0.37%
    • 37%

  9. Express 3/8 as a percentage.

    • 37.5%
    • 30%
    • 83%
    • 38%

  10. Express 45 as a percentage of 60.

    • 45%
    • 15%
    • 133%
    • 75%

  11. What multiplier represents an increase of 35%?

    • 3.5
    • 1.35
    • 0.65
    • 0.35

  12. What multiplier represents a decrease of 8%?

    • 8
    • 0.92
    • 0.08
    • 1.08

  13. A shirt costs 40 pounds plus 20% VAT. What is the total price?

    • 42 pounds
    • 48 pounds
    • 60 pounds
    • 8 pounds

  14. 180 is what percentage of 120?

    • 15%
    • 67%
    • 60%
    • 150%

  15. Shop A takes 15% off 80 pounds. Shop B takes 20% off 70 pounds. Which is cheaper and by how much?

    • Shop B, at 56 pounds
    • Shop A, at 68 pounds
    • Both cost 68 pounds
    • Shop A, at 64 pounds

  16. A quantity increases by 10% and then by a further 10%. What is the overall percentage increase?

    • 10%
    • 21%
    • 22%
    • 20%

  17. Simple interest of 36 pounds is earned at 6% per year for 2 years. What was the principal?

    • 600 pounds
    • 216 pounds
    • 300 pounds
    • 3 pounds

  18. After a 20% reduction, a price is 32 pounds. What was the original price?

    • 25.60 pounds
    • 40 pounds
    • 38.40 pounds
    • 52 pounds

  19. Which expression gives the percentage change from 50 to 65?

    • (65 - 50) / 50 x 100
    • (50 - 65) / 65 x 100
    • 65 / 50 x 100
    • (65 + 50) / 50 x 100

  20. (H) 1000 pounds is invested at 5% simple interest per year for 3 years. What is the total value?

    • 1157.63 pounds
    • 1050 pounds
    • 1300 pounds
    • 1150 pounds

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