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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 154 · 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.A price goes up by 10% and then comes down by 5%. By what percent has it gone up in all? =
  2. 2.A price goes up by 40% and then goes up by 30% more. By what percent has it gone up in all? =
  3. 3.The price of a bicycle is ₹1060. It goes up by 15%. What is the new price (in ₹)?
  4. 4.A water tank holds 460 litres. 5% of the water is used. How many litres are left?
  5. 5.A town has 2160 people. Its population grows by 15%. How many people live there now?
  6. 6.A water tank holds 4900 litres. 10% of the water is used. How many litres are left?
  7. 7.A price goes up by 15% and then goes up by 15% more. By what percent has it gone up in all? =
  8. 8.A price goes up by 30% and then goes up by 10% more. By what percent has it gone up in all? =
  9. 9.The price of a bicycle is ₹2940. It goes up by 15%. What is the new price (in ₹)?
  10. 10.A price goes up by 30% and then goes up by 5% more. By what percent has it gone up in all? =
  11. 11.A price comes down by 30% and then comes down by 50% more. By what percent has it come down in all? =
  12. 12.A price goes up by 50% and then goes up by 15% more. By what percent has it gone up in all? =
  13. 13.A water tank holds 2380 litres. 30% of the water is used. How many litres are left?
  14. 14.The price of a school bag changes from ₹600 to ₹480. By what percent did it come down?
  15. 15.The price of a bicycle is ₹1120. It goes up by 20%. What is the new price (in ₹)?
  16. 16.A price comes down by 15% and then comes down by 15% more. By what percent has it come down in all? =
  17. 17.A town has 1760 people. Its population grows by 5%. How many people live there now?
  18. 18.A water tank holds 2200 litres. 30% of the water is used. How many litres are left?
  19. 19.A water tank holds 1680 litres. 10% of the water is used. How many litres are left?
  20. 20.A shop sells 3840 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  21. 21.A price comes down by 10% and then comes down by 5% more. By what percent has it come down in all? =
  22. 22.A price comes down by 25% and then comes down by 25% more. By what percent has it come down in all? =
  23. 23.A price goes up by 20% and then goes up by 15% more. By what percent has it gone up in all? =
  24. 24.The price of a school bag changes from ₹5000 to ₹7000. By what percent did it go up?
  25. 25.A price comes down by 5% and then comes down by 25% more. By what percent has it come down in all? =
  26. 26.The price of a bicycle is ₹3280. It goes up by 40%. What is the new price (in ₹)?
  27. 27.A shop sells 1360 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  28. 28.A shop sells 4660 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  29. 29.A town has 2560 people. Its population grows by 40%. How many people live there now?
  30. 30.A water tank holds 380 litres. 25% of the water is used. How many litres are left?
  31. 31.A water tank holds 1020 litres. 5% of the water is used. How many litres are left?
  32. 32.The price of a school bag changes from ₹1440 to ₹1080. By what percent did it come down?
  33. 33.A water tank holds 1480 litres. 10% of the water is used. How many litres are left?
  34. 34.The price of a school bag changes from ₹2820 to ₹2538. By what percent did it come down?
  35. 35.A water tank holds 3060 litres. 5% of the water is used. How many litres are left?
  36. 36.The price of a school bag changes from ₹4560 to ₹4332. By what percent did it come down?
  37. 37.A shop sells 2460 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  38. 38.A water tank holds 160 litres. 15% of the water is used. How many litres are left?
  39. 39.A shop sells 2780 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  40. 40.The price of a school bag changes from ₹1000 to ₹1200. By what percent did it go up?

Answer key

  1. 4.5
  2. 82
  3. 1219
  4. 437
  5. 2484
  6. 4410
  7. 32.25
  8. 43
  9. 3381
  10. 36.5
  11. 65
  12. 72.5
  13. 1666
  14. 20
  15. 1344
  16. 27.75
  17. 1848
  18. 1540
  19. 1512
  20. 5376
  21. 14.5
  22. 43.75
  23. 38
  24. 40
  25. 28.75
  26. 4592
  27. 1632
  28. 5359
  29. 3584
  30. 285
  31. 969
  32. 25
  33. 1332
  34. 10
  35. 2907
  36. 5
  37. 3444
  38. 136
  39. 3336
  40. 20

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