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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 615 · 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 15% and then comes down by 5%. By what percent has it gone up in all? =
  2. 2.The price of a bicycle is ₹620. It goes up by 20%. What is the new price (in ₹)?
  3. 3.A price comes down by 20% and then comes down by 10% more. By what percent has it come down in all? =
  4. 4.A price comes down by 15% and then comes down by 15% more. By what percent has it come down in all? =
  5. 5.A water tank holds 2640 litres. 5% of the water is used. How many litres are left?
  6. 6.A water tank holds 260 litres. 10% of the water is used. How many litres are left?
  7. 7.A water tank holds 860 litres. 10% of the water is used. How many litres are left?
  8. 8.A price goes up by 20% and then goes up by 50% more. By what percent has it gone up in all? =
  9. 9.A price comes down by 15% and then comes down by 10% more. By what percent has it come down in all? =
  10. 10.A price goes up by 30% and then goes up by 5% more. By what percent has it gone up in all? =
  11. 11.A town has 2400 people. Its population grows by 30%. How many people live there now?
  12. 12.A water tank holds 240 litres. 5% of the water is used. How many litres are left?
  13. 13.A shop sells 3500 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  14. 14.A shop sells 4580 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  15. 15.A price goes up by 50% and then comes down by 20%. By what percent has it gone up in all? =
  16. 16.The price of a school bag changes from ₹1240 to ₹1178. By what percent did it come down?
  17. 17.A price comes down by 30% and then comes down by 5% more. By what percent has it come down in all? =
  18. 18.A shop sells 2780 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  19. 19.The price of a school bag changes from ₹1140 to ₹1425. By what percent did it go up?
  20. 20.A price goes up by 20% and then goes up by 5% more. By what percent has it gone up in all? =
  21. 21.The price of a bicycle is ₹1240. It goes up by 50%. What is the new price (in ₹)?
  22. 22.A price comes down by 20% and then comes down by 30% more. By what percent has it come down in all? =
  23. 23.A water tank holds 3940 litres. 15% of the water is used. How many litres are left?
  24. 24.The price of a bicycle is ₹2020. It goes up by 25%. What is the new price (in ₹)?
  25. 25.The price of a bicycle is ₹2980. It goes up by 50%. What is the new price (in ₹)?
  26. 26.A water tank holds 2720 litres. 10% of the water is used. How many litres are left?
  27. 27.A water tank holds 2480 litres. 5% of the water is used. How many litres are left?
  28. 28.The price of a school bag changes from ₹4720 to ₹6136. By what percent did it go up?
  29. 29.A water tank holds 1660 litres. 5% of the water is used. How many litres are left?
  30. 30.A water tank holds 4780 litres. 20% of the water is used. How many litres are left?
  31. 31.A town has 2840 people. Its population grows by 20%. How many people live there now?
  32. 32.The price of a school bag changes from ₹4540 to ₹4994. By what percent did it go up?
  33. 33.A water tank holds 2900 litres. 20% of the water is used. How many litres are left?
  34. 34.The price of a school bag changes from ₹600 to ₹780. By what percent did it go up?
  35. 35.The price of a bicycle is ₹480. It goes up by 10%. What is the new price (in ₹)?
  36. 36.A price comes down by 20% and then comes down by 15% more. By what percent has it come down in all? =
  37. 37.A town has 2600 people. Its population grows by 25%. How many people live there now?
  38. 38.The price of a school bag changes from ₹620 to ₹744. By what percent did it go up?
  39. 39.The price of a school bag changes from ₹2120 to ₹2756. By what percent did it go up?
  40. 40.A price goes up by 5% and then goes up by 5% more. By what percent has it gone up in all? =

Answer key

  1. 9.25
  2. 744
  3. 28
  4. 27.75
  5. 2508
  6. 234
  7. 774
  8. 80
  9. 23.5
  10. 36.5
  11. 3120
  12. 228
  13. 4200
  14. 5038
  15. 20
  16. 5
  17. 33.5
  18. 3475
  19. 25
  20. 26
  21. 1860
  22. 44
  23. 3349
  24. 2525
  25. 4470
  26. 2448
  27. 2356
  28. 30
  29. 1577
  30. 3824
  31. 3408
  32. 10
  33. 2320
  34. 30
  35. 528
  36. 32
  37. 3250
  38. 20
  39. 30
  40. 10.25

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