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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 839 · 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 town has 4620 people. Its population grows by 30%. How many people live there now?
  2. 2.The price of a school bag changes from ₹3180 to ₹1908. By what percent did it come down?
  3. 3.The price of a bicycle is ₹2180. It goes up by 25%. What is the new price (in ₹)?
  4. 4.A water tank holds 4540 litres. 10% of the water is used. How many litres are left?
  5. 5.The price of a school bag changes from ₹760 to ₹874. By what percent did it go up?
  6. 6.The price of a bicycle is ₹1840. It goes up by 40%. What is the new price (in ₹)?
  7. 7.A water tank holds 560 litres. 10% of the water is used. How many litres are left?
  8. 8.A price comes down by 5% and then comes down by 50% more. By what percent has it come down in all? =
  9. 9.The price of a school bag changes from ₹4660 to ₹3728. By what percent did it come down?
  10. 10.A price goes up by 25% and then goes up by 25% more. By what percent has it gone up in all? =
  11. 11.A water tank holds 4420 litres. 25% of the water is used. How many litres are left?
  12. 12.A water tank holds 2380 litres. 15% of the water is used. How many litres are left?
  13. 13.The price of a school bag changes from ₹2800 to ₹3220. By what percent did it go up?
  14. 14.The price of a school bag changes from ₹3640 to ₹2912. By what percent did it come down?
  15. 15.The price of a school bag changes from ₹1640 to ₹1722. By what percent did it go up?
  16. 16.A water tank holds 300 litres. 20% of the water is used. How many litres are left?
  17. 17.A shop sells 440 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  18. 18.A price goes up by 40% and then comes down by 10%. By what percent has it gone up in all? =
  19. 19.A town has 700 people. Its population grows by 50%. How many people live there now?
  20. 20.A water tank holds 3380 litres. 5% of the water is used. How many litres are left?
  21. 21.The price of a bicycle is ₹1960. It goes up by 10%. What is the new price (in ₹)?
  22. 22.The price of a bicycle is ₹3140. It goes up by 10%. What is the new price (in ₹)?
  23. 23.The price of a bicycle is ₹500. It goes up by 5%. What is the new price (in ₹)?
  24. 24.The price of a bicycle is ₹520. It goes up by 10%. What is the new price (in ₹)?
  25. 25.The price of a school bag changes from ₹3820 to ₹4202. By what percent did it go up?
  26. 26.A price goes up by 25% and then comes down by 15%. By what percent has it gone up in all? =
  27. 27.A town has 1920 people. Its population grows by 10%. How many people live there now?
  28. 28.A water tank holds 440 litres. 50% of the water is used. How many litres are left?
  29. 29.A town has 980 people. Its population grows by 40%. How many people live there now?
  30. 30.The price of a school bag changes from ₹4940 to ₹5434. By what percent did it go up?
  31. 31.The price of a bicycle is ₹1060. It goes up by 30%. What is the new price (in ₹)?
  32. 32.A water tank holds 4300 litres. 10% of the water is used. How many litres are left?
  33. 33.A price goes up by 25% and then goes up by 30% more. By what percent has it gone up in all? =
  34. 34.A shop sells 1380 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  35. 35.A price comes down by 5% and then comes down by 40% more. By what percent has it come down in all? =
  36. 36.A water tank holds 4680 litres. 40% of the water is used. How many litres are left?
  37. 37.The price of a school bag changes from ₹3800 to ₹4940. By what percent did it go up?
  38. 38.A town has 1000 people. Its population grows by 25%. How many people live there now?
  39. 39.The price of a school bag changes from ₹1500 to ₹1875. By what percent did it go up?
  40. 40.A price goes up by 20% and then goes up by 25% more. By what percent has it gone up in all? =

Answer key

  1. 6006
  2. 40
  3. 2725
  4. 4086
  5. 15
  6. 2576
  7. 504
  8. 52.5
  9. 20
  10. 56.25
  11. 3315
  12. 2023
  13. 15
  14. 20
  15. 5
  16. 240
  17. 506
  18. 26
  19. 1050
  20. 3211
  21. 2156
  22. 3454
  23. 525
  24. 572
  25. 10
  26. 6.25
  27. 2112
  28. 220
  29. 1372
  30. 10
  31. 1378
  32. 3870
  33. 62.5
  34. 1587
  35. 43
  36. 2808
  37. 30
  38. 1250
  39. 25
  40. 50

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