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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 427 · 40 questions
TalentJR

The method (Start value is 100%): New value after a rise of p%: value + p% of value. After a fall: value − p% of value. Percent change = change ÷ starting value × 100. Two changes a% and b% one after the other: a + b + (a × b) ÷ 100, with a fall counted as minus.

NameDateTime takenScore ___ / 40
  1. 1.The price of a school bag changes from ₹2460 to ₹2829. By what percent did it go up?
  2. 2.A water tank holds 900 litres. 40% of the water is used. How many litres are left?
  3. 3.A water tank holds 3300 litres. 15% of the water is used. How many litres are left?
  4. 4.A town has 740 people. Its population grows by 10%. How many people live there now?
  5. 5.A price goes up by 15% and then goes up by 20% more. By what percent has it gone up in all? =
  6. 6.A shop sells 4420 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  7. 7.The price of a bicycle is ₹1120. It goes up by 25%. What is the new price (in ₹)?
  8. 8.A water tank holds 240 litres. 40% of the water is used. How many litres are left?
  9. 9.A water tank holds 1240 litres. 30% of the water is used. How many litres are left?
  10. 10.A price goes up by 30% and then goes up by 50% more. By what percent has it gone up in all? =
  11. 11.A water tank holds 200 litres. 10% of the water is used. How many litres are left?
  12. 12.A price goes up by 15% and then goes up by 10% more. By what percent has it gone up in all? =
  13. 13.The price of a school bag changes from ₹3700 to ₹4810. By what percent did it go up?
  14. 14.A water tank holds 4900 litres. 5% of the water is used. How many litres are left?
  15. 15.A town has 1620 people. Its population grows by 25%. How many people live there now?
  16. 16.A shop sells 4040 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  17. 17.A price goes up by 50% and then goes up by 15% more. By what percent has it gone up in all? =
  18. 18.A shop sells 4940 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  19. 19.A water tank holds 120 litres. 50% of the water is used. How many litres are left?
  20. 20.A shop sells 3320 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  21. 21.The price of a school bag changes from ₹600 to ₹840. By what percent did it go up?
  22. 22.The price of a school bag changes from ₹2600 to ₹3250. By what percent did it go up?
  23. 23.A town has 2920 people. Its population grows by 30%. How many people live there now?
  24. 24.A price comes down by 5% and then comes down by 15% more. By what percent has it come down in all? =
  25. 25.A town has 4940 people. Its population grows by 15%. How many people live there now?
  26. 26.A shop sells 4660 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  27. 27.The price of a school bag changes from ₹4280 to ₹3210. By what percent did it come down?
  28. 28.A water tank holds 580 litres. 40% of the water is used. How many litres are left?
  29. 29.A water tank holds 3320 litres. 10% of the water is used. How many litres are left?
  30. 30.A water tank holds 2720 litres. 30% of the water is used. How many litres are left?
  31. 31.A water tank holds 3300 litres. 30% of the water is used. How many litres are left?
  32. 32.A price goes up by 5% and then goes up by 20% more. By what percent has it gone up in all? =
  33. 33.The price of a school bag changes from ₹4300 to ₹6450. By what percent did it go up?
  34. 34.The price of a school bag changes from ₹4140 to ₹3933. By what percent did it come down?
  35. 35.The price of a school bag changes from ₹260 to ₹312. By what percent did it go up?
  36. 36.A water tank holds 3880 litres. 25% of the water is used. How many litres are left?
  37. 37.The price of a school bag changes from ₹120 to ₹72. By what percent did it come down?
  38. 38.A shop sells 60 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  39. 39.The price of a school bag changes from ₹3720 to ₹3534. By what percent did it come down?
  40. 40.The price of a school bag changes from ₹3400 to ₹3060. By what percent did it come down?

Answer key

  1. 15
  2. 540
  3. 2805
  4. 814
  5. 38
  6. 5525
  7. 1400
  8. 144
  9. 868
  10. 95
  11. 180
  12. 26.5
  13. 30
  14. 4655
  15. 2025
  16. 4646
  17. 72.5
  18. 6422
  19. 60
  20. 3984
  21. 40
  22. 25
  23. 3796
  24. 19.25
  25. 5681
  26. 6058
  27. 25
  28. 348
  29. 2988
  30. 1904
  31. 2310
  32. 26
  33. 50
  34. 5
  35. 20
  36. 2910
  37. 40
  38. 78
  39. 5
  40. 10

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