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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 566 · 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 25% and then goes up by 15% more. By what percent has it gone up in all? =
  2. 2.A water tank holds 2180 litres. 30% of the water is used. How many litres are left?
  3. 3.A price goes up by 40% and then goes up by 40% more. By what percent has it gone up in all? =
  4. 4.A town has 560 people. Its population grows by 25%. How many people live there now?
  5. 5.A price goes up by 40% and then comes down by 10%. By what percent has it gone up in all? =
  6. 6.A water tank holds 4940 litres. 50% of the water is used. How many litres are left?
  7. 7.A water tank holds 3440 litres. 30% of the water is used. How many litres are left?
  8. 8.A town has 2180 people. Its population grows by 5%. How many people live there now?
  9. 9.The price of a school bag changes from ₹60 to ₹72. By what percent did it go up?
  10. 10.A water tank holds 4140 litres. 50% of the water is used. How many litres are left?
  11. 11.The price of a school bag changes from ₹640 to ₹384. By what percent did it come down?
  12. 12.A water tank holds 600 litres. 15% of the water is used. How many litres are left?
  13. 13.A water tank holds 1000 litres. 15% of the water is used. How many litres are left?
  14. 14.A town has 2080 people. Its population grows by 40%. How many people live there now?
  15. 15.A water tank holds 4360 litres. 10% of the water is used. How many litres are left?
  16. 16.The price of a school bag changes from ₹4640 to ₹2320. By what percent did it come down?
  17. 17.A water tank holds 3540 litres. 10% of the water is used. How many litres are left?
  18. 18.The price of a bicycle is ₹1080. It goes up by 10%. What is the new price (in ₹)?
  19. 19.A water tank holds 560 litres. 10% of the water is used. How many litres are left?
  20. 20.The price of a school bag changes from ₹220 to ₹330. By what percent did it go up?
  21. 21.The price of a school bag changes from ₹2080 to ₹1872. By what percent did it come down?
  22. 22.A water tank holds 4960 litres. 5% of the water is used. How many litres are left?
  23. 23.A water tank holds 280 litres. 5% of the water is used. How many litres are left?
  24. 24.The price of a bicycle is ₹2640. It goes up by 50%. What is the new price (in ₹)?
  25. 25.The price of a school bag changes from ₹3840 to ₹2304. By what percent did it come down?
  26. 26.The price of a school bag changes from ₹180 to ₹234. By what percent did it go up?
  27. 27.A water tank holds 1820 litres. 40% of the water is used. How many litres are left?
  28. 28.The price of a bicycle is ₹2640. It goes up by 5%. What is the new price (in ₹)?
  29. 29.The price of a school bag changes from ₹1020 to ₹816. By what percent did it come down?
  30. 30.The price of a school bag changes from ₹1280 to ₹640. By what percent did it come down?
  31. 31.A shop sells 2900 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  32. 32.A town has 1760 people. Its population grows by 20%. How many people live there now?
  33. 33.A price goes up by 15% and then comes down by 5%. By what percent has it gone up in all? =
  34. 34.The price of a school bag changes from ₹3740 to ₹3179. By what percent did it come down?
  35. 35.The price of a school bag changes from ₹3140 to ₹3925. By what percent did it go up?
  36. 36.A price goes up by 50% and then goes up by 15% more. By what percent has it gone up in all? =
  37. 37.A price comes down by 15% and then comes down by 20% more. By what percent has it come down in all? =
  38. 38.The price of a bicycle is ₹3380. It goes up by 40%. What is the new price (in ₹)?
  39. 39.A price goes up by 10% and then goes up by 40% more. By what percent has it gone up in all? =
  40. 40.A water tank holds 4400 litres. 10% of the water is used. How many litres are left?

Answer key

  1. 43.75
  2. 1526
  3. 96
  4. 700
  5. 26
  6. 2470
  7. 2408
  8. 2289
  9. 20
  10. 2070
  11. 40
  12. 510
  13. 850
  14. 2912
  15. 3924
  16. 50
  17. 3186
  18. 1188
  19. 504
  20. 50
  21. 10
  22. 4712
  23. 266
  24. 3960
  25. 40
  26. 30
  27. 1092
  28. 2772
  29. 20
  30. 50
  31. 3770
  32. 2112
  33. 9.25
  34. 15
  35. 25
  36. 72.5
  37. 32
  38. 4732
  39. 54
  40. 3960

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