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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 865 · 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 15% and then comes down by 5% more. By what percent has it come down in all? =
  2. 2.A water tank holds 4340 litres. 20% of the water is used. How many litres are left?
  3. 3.A price comes down by 40% and then comes down by 30% more. By what percent has it come down in all? =
  4. 4.The price of a bicycle is ₹1420. It goes up by 25%. What is the new price (in ₹)?
  5. 5.The price of a bicycle is ₹2900. It goes up by 50%. What is the new price (in ₹)?
  6. 6.A water tank holds 4040 litres. 5% of the water is used. How many litres are left?
  7. 7.The price of a school bag changes from ₹1360 to ₹1428. By what percent did it go up?
  8. 8.A water tank holds 2020 litres. 30% of the water is used. How many litres are left?
  9. 9.A water tank holds 3580 litres. 5% of the water is used. How many litres are left?
  10. 10.A water tank holds 4260 litres. 40% of the water is used. How many litres are left?
  11. 11.A water tank holds 280 litres. 30% of the water is used. How many litres are left?
  12. 12.A water tank holds 1980 litres. 40% of the water is used. How many litres are left?
  13. 13.A town has 2500 people. Its population grows by 30%. How many people live there now?
  14. 14.A water tank holds 2740 litres. 25% of the water is used. How many litres are left?
  15. 15.A shop sells 1380 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  16. 16.The price of a school bag changes from ₹940 to ₹1128. By what percent did it go up?
  17. 17.A water tank holds 3600 litres. 50% of the water is used. How many litres are left?
  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.The price of a bicycle is ₹2580. It goes up by 25%. What is the new price (in ₹)?
  20. 20.A water tank holds 1120 litres. 50% of the water is used. How many litres are left?
  21. 21.A town has 4440 people. Its population grows by 25%. How many people live there now?
  22. 22.A town has 1000 people. Its population grows by 50%. How many people live there now?
  23. 23.A price comes down by 20% and then comes down by 50% more. By what percent has it come down in all? =
  24. 24.The price of a school bag changes from ₹2200 to ₹1980. By what percent did it come down?
  25. 25.A water tank holds 1540 litres. 20% of the water is used. How many litres are left?
  26. 26.The price of a bicycle is ₹320. It goes up by 50%. What is the new price (in ₹)?
  27. 27.A price comes down by 5% and then comes down by 25% more. By what percent has it come down in all? =
  28. 28.A water tank holds 420 litres. 15% of the water is used. How many litres are left?
  29. 29.A price goes up by 20% and then comes down by 10%. By what percent has it gone up in all? =
  30. 30.The price of a school bag changes from ₹760 to ₹722. By what percent did it come down?
  31. 31.A water tank holds 2460 litres. 20% of the water is used. How many litres are left?
  32. 32.A price comes down by 10% and then comes down by 30% more. By what percent has it come down in all? =
  33. 33.The price of a school bag changes from ₹3760 to ₹1880. By what percent did it come down?
  34. 34.The price of a school bag changes from ₹4320 to ₹2592. By what percent did it come down?
  35. 35.A water tank holds 3420 litres. 5% of the water is used. How many litres are left?
  36. 36.The price of a bicycle is ₹4500. It goes up by 5%. What is the new price (in ₹)?
  37. 37.A water tank holds 4080 litres. 15% of the water is used. How many litres are left?
  38. 38.The price of a school bag changes from ₹360 to ₹396. By what percent did it go up?
  39. 39.A water tank holds 440 litres. 15% of the water is used. How many litres are left?
  40. 40.A price goes up by 30% and then goes up by 40% more. By what percent has it gone up in all? =

Answer key

  1. 19.25
  2. 3472
  3. 58
  4. 1775
  5. 4350
  6. 3838
  7. 5
  8. 1414
  9. 3401
  10. 2556
  11. 196
  12. 1188
  13. 3250
  14. 2055
  15. 1518
  16. 20
  17. 1800
  18. 26
  19. 3225
  20. 560
  21. 5550
  22. 1500
  23. 60
  24. 10
  25. 1232
  26. 480
  27. 28.75
  28. 357
  29. 8
  30. 5
  31. 1968
  32. 37
  33. 50
  34. 40
  35. 3249
  36. 4725
  37. 3468
  38. 10
  39. 374
  40. 82

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