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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 486 · 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 bicycle is ₹940. It goes up by 15%. What is the new price (in ₹)?
  2. 2.A town has 1360 people. Its population grows by 25%. How many people live there now?
  3. 3.The price of a bicycle is ₹100. It goes up by 40%. What is the new price (in ₹)?
  4. 4.A water tank holds 2800 litres. 30% of the water is used. How many litres are left?
  5. 5.The price of a school bag changes from ₹100 to ₹130. By what percent did it go up?
  6. 6.The price of a bicycle is ₹1540. It goes up by 40%. What is the new price (in ₹)?
  7. 7.The price of a school bag changes from ₹3100 to ₹4030. By what percent did it go up?
  8. 8.A water tank holds 700 litres. 40% of the water is used. How many litres are left?
  9. 9.A town has 1300 people. Its population grows by 40%. How many people live there now?
  10. 10.A price comes down by 50% and then comes down by 10% more. By what percent has it come down in all? =
  11. 11.A price goes up by 30% and then goes up by 25% more. By what percent has it gone up in all? =
  12. 12.A water tank holds 460 litres. 5% of the water is used. How many litres are left?
  13. 13.A water tank holds 1060 litres. 10% of the water is used. How many litres are left?
  14. 14.A price goes up by 40% and then comes down by 5%. By what percent has it gone up in all? =
  15. 15.A shop sells 3360 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  16. 16.A water tank holds 1340 litres. 30% of the water is used. How many litres are left?
  17. 17.A water tank holds 4980 litres. 20% of the water is used. How many litres are left?
  18. 18.The price of a school bag changes from ₹2840 to ₹1420. By what percent did it come down?
  19. 19.A price comes down by 30% and then comes down by 25% more. By what percent has it come down in all? =
  20. 20.A town has 1740 people. Its population grows by 20%. How many people live there now?
  21. 21.A price goes up by 20% and then goes up by 10% more. By what percent has it gone up in all? =
  22. 22.The price of a school bag changes from ₹1020 to ₹714. By what percent did it come down?
  23. 23.The price of a bicycle is ₹3100. It goes up by 10%. What is the new price (in ₹)?
  24. 24.A water tank holds 440 litres. 5% of the water is used. How many litres are left?
  25. 25.The price of a school bag changes from ₹4780 to ₹5497. By what percent did it go up?
  26. 26.A price comes down by 15% and then comes down by 10% more. By what percent has it come down in all? =
  27. 27.The price of a school bag changes from ₹680 to ₹748. By what percent did it go up?
  28. 28.The price of a school bag changes from ₹1780 to ₹1691. By what percent did it come down?
  29. 29.The price of a school bag changes from ₹920 to ₹1104. By what percent did it go up?
  30. 30.A water tank holds 5000 litres. 40% of the water is used. How many litres are left?
  31. 31.The price of a school bag changes from ₹2100 to ₹1995. By what percent did it come down?
  32. 32.A price comes down by 15% and then comes down by 30% more. By what percent has it come down in all? =
  33. 33.A town has 920 people. Its population grows by 40%. How many people live there now?
  34. 34.A water tank holds 2340 litres. 50% of the water is used. How many litres are left?
  35. 35.A water tank holds 4060 litres. 20% of the water is used. How many litres are left?
  36. 36.A shop sells 400 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  37. 37.A water tank holds 4840 litres. 30% of the water is used. How many litres are left?
  38. 38.A price goes up by 15% and then goes up by 15% more. By what percent has it gone up in all? =
  39. 39.The price of a school bag changes from ₹1320 to ₹924. By what percent did it come down?
  40. 40.A price comes down by 25% and then comes down by 50% more. By what percent has it come down in all? =

Answer key

  1. 1081
  2. 1700
  3. 140
  4. 1960
  5. 30
  6. 2156
  7. 30
  8. 420
  9. 1820
  10. 55
  11. 62.5
  12. 437
  13. 954
  14. 33
  15. 5040
  16. 938
  17. 3984
  18. 50
  19. 47.5
  20. 2088
  21. 32
  22. 30
  23. 3410
  24. 418
  25. 15
  26. 23.5
  27. 10
  28. 5
  29. 20
  30. 3000
  31. 5
  32. 40.5
  33. 1288
  34. 1170
  35. 3248
  36. 460
  37. 3388
  38. 32.25
  39. 30
  40. 62.5

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