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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 598 · 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 40% and then goes up by 30% more. By what percent has it gone up in all? =
  2. 2.A price goes up by 15% and then comes down by 10%. By what percent has it gone up in all? =
  3. 3.A price goes up by 5% and then goes up by 25% more. By what percent has it gone up in all? =
  4. 4.A price goes up by 50% and then comes down by 30%. By what percent has it gone up in all? =
  5. 5.A shop sells 1120 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  6. 6.The price of a school bag changes from ₹820 to ₹738. By what percent did it come down?
  7. 7.A price goes up by 20% and then goes up by 5% more. By what percent has it gone up in all? =
  8. 8.A water tank holds 2040 litres. 15% of the water is used. How many litres are left?
  9. 9.A price goes up by 30% and then goes up by 40% more. By what percent has it gone up in all? =
  10. 10.A water tank holds 3480 litres. 20% of the water is used. How many litres are left?
  11. 11.A price comes down by 40% and then comes down by 5% more. By what percent has it come down in all? =
  12. 12.A town has 940 people. Its population grows by 15%. How many people live there now?
  13. 13.A water tank holds 3200 litres. 30% of the water is used. How many litres are left?
  14. 14.A water tank holds 4220 litres. 20% of the water is used. How many litres are left?
  15. 15.The price of a school bag changes from ₹4000 to ₹4200. By what percent did it go up?
  16. 16.A water tank holds 420 litres. 25% of the water is used. How many litres are left?
  17. 17.A price goes up by 10% and then comes down by 5%. By what percent has it gone up in all? =
  18. 18.A water tank holds 2560 litres. 40% of the water is used. How many litres are left?
  19. 19.A price goes up by 25% and then comes down by 10%. By what percent has it gone up in all? =
  20. 20.A town has 2860 people. Its population grows by 25%. How many people live there now?
  21. 21.A price comes down by 10% and then comes down by 20% more. By what percent has it come down in all? =
  22. 22.The price of a school bag changes from ₹120 to ₹132. By what percent did it go up?
  23. 23.A water tank holds 4960 litres. 20% of the water is used. How many litres are left?
  24. 24.A shop sells 2620 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  25. 25.A shop sells 1820 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  26. 26.A shop sells 720 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  27. 27.A town has 1520 people. Its population grows by 20%. How many people live there now?
  28. 28.A price comes down by 15% and then comes down by 30% more. By what percent has it come down in all? =
  29. 29.The price of a bicycle is ₹1460. It goes up by 40%. What is the new price (in ₹)?
  30. 30.A shop sells 1760 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  31. 31.A water tank holds 1380 litres. 5% of the water is used. How many litres are left?
  32. 32.The price of a school bag changes from ₹4480 to ₹4256. By what percent did it come down?
  33. 33.A price comes down by 20% and then comes down by 40% more. By what percent has it come down in all? =
  34. 34.The price of a school bag changes from ₹2180 to ₹1744. By what percent did it come down?
  35. 35.A water tank holds 3940 litres. 10% of the water is used. How many litres are left?
  36. 36.The price of a school bag changes from ₹4280 to ₹5350. By what percent did it go up?
  37. 37.The price of a school bag changes from ₹1760 to ₹2024. By what percent did it go up?
  38. 38.A water tank holds 1120 litres. 20% of the water is used. How many litres are left?
  39. 39.The price of a bicycle is ₹3320. It goes up by 5%. What is the new price (in ₹)?
  40. 40.A price goes up by 30% and then goes up by 5% more. By what percent has it gone up in all? =

Answer key

  1. 82
  2. 3.5
  3. 31.25
  4. 5
  5. 1176
  6. 10
  7. 26
  8. 1734
  9. 82
  10. 2784
  11. 43
  12. 1081
  13. 2240
  14. 3376
  15. 5
  16. 315
  17. 4.5
  18. 1536
  19. 12.5
  20. 3575
  21. 28
  22. 10
  23. 3968
  24. 3406
  25. 2730
  26. 1008
  27. 1824
  28. 40.5
  29. 2044
  30. 2288
  31. 1311
  32. 5
  33. 52
  34. 20
  35. 3546
  36. 25
  37. 15
  38. 896
  39. 3486
  40. 36.5

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