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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 369 · 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 comes down by 50% and then comes down by 10% more. By what percent has it come down in all? =
  2. 2.A water tank holds 4780 litres. 10% of the water is used. How many litres are left?
  3. 3.A shop sells 1440 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  4. 4.A town has 3820 people. Its population grows by 20%. How many people live there now?
  5. 5.The price of a school bag changes from ₹3920 to ₹2744. By what percent did it come down?
  6. 6.A price comes down by 30% and then comes down by 25% more. By what percent has it come down in all? =
  7. 7.The price of a school bag changes from ₹160 to ₹168. By what percent did it go up?
  8. 8.A water tank holds 2340 litres. 30% of the water is used. How many litres are left?
  9. 9.A water tank holds 200 litres. 20% of the water is used. How many litres are left?
  10. 10.A water tank holds 4140 litres. 25% of the water is used. How many litres are left?
  11. 11.A shop sells 3280 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  12. 12.The price of a school bag changes from ₹160 to ₹176. By what percent did it go up?
  13. 13.The price of a school bag changes from ₹1840 to ₹2576. By what percent did it go up?
  14. 14.The price of a school bag changes from ₹4180 to ₹4389. By what percent did it go up?
  15. 15.The price of a bicycle is ₹900. It goes up by 25%. What is the new price (in ₹)?
  16. 16.A price comes down by 20% and then comes down by 15% more. By what percent has it come down in all? =
  17. 17.A price goes up by 10% and then goes up by 5% more. By what percent has it gone up in all? =
  18. 18.A price goes up by 15% and then goes up by 15% more. By what percent has it gone up in all? =
  19. 19.A price goes up by 30% and then goes up by 15% more. By what percent has it gone up in all? =
  20. 20.The price of a school bag changes from ₹1540 to ₹1617. By what percent did it go up?
  21. 21.The price of a school bag changes from ₹4860 to ₹5103. By what percent did it go up?
  22. 22.The price of a bicycle is ₹3300. It goes up by 10%. What is the new price (in ₹)?
  23. 23.The price of a school bag changes from ₹2540 to ₹2794. By what percent did it go up?
  24. 24.The price of a school bag changes from ₹500 to ₹550. By what percent did it go up?
  25. 25.A price goes up by 10% and then goes up by 30% more. By what percent has it gone up in all? =
  26. 26.The price of a school bag changes from ₹2940 to ₹2352. By what percent did it come down?
  27. 27.A town has 1300 people. Its population grows by 10%. How many people live there now?
  28. 28.The price of a school bag changes from ₹4740 to ₹4266. By what percent did it come down?
  29. 29.A water tank holds 1620 litres. 5% of the water is used. How many litres are left?
  30. 30.A price goes up by 15% and then goes up by 5% more. By what percent has it gone up in all? =
  31. 31.A price goes up by 30% and then goes up by 50% more. By what percent has it gone up in all? =
  32. 32.A water tank holds 4480 litres. 50% of the water is used. How many litres are left?
  33. 33.A price comes down by 50% and then comes down by 15% more. By what percent has it come down in all? =
  34. 34.A price goes up by 15% and then goes up by 30% more. By what percent has it gone up in all? =
  35. 35.A price goes up by 40% and then goes up by 40% more. By what percent has it gone up in all? =
  36. 36.The price of a bicycle is ₹1280. It goes up by 10%. What is the new price (in ₹)?
  37. 37.A water tank holds 2180 litres. 40% of the water is used. How many litres are left?
  38. 38.The price of a bicycle is ₹300. It goes up by 5%. What is the new price (in ₹)?
  39. 39.A shop sells 3960 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  40. 40.The price of a school bag changes from ₹360 to ₹378. By what percent did it go up?

Answer key

  1. 55
  2. 4302
  3. 1728
  4. 4584
  5. 30
  6. 47.5
  7. 5
  8. 1638
  9. 160
  10. 3105
  11. 4920
  12. 10
  13. 40
  14. 5
  15. 1125
  16. 32
  17. 15.5
  18. 32.25
  19. 49.5
  20. 5
  21. 5
  22. 3630
  23. 10
  24. 10
  25. 43
  26. 20
  27. 1430
  28. 10
  29. 1539
  30. 20.75
  31. 95
  32. 2240
  33. 57.5
  34. 49.5
  35. 96
  36. 1408
  37. 1308
  38. 315
  39. 4158
  40. 5

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