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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 409 · 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 water tank holds 500 litres. 15% of the water is used. How many litres are left?
  2. 2.The price of a bicycle is ₹3620. It goes up by 50%. What is the new price (in ₹)?
  3. 3.The price of a bicycle is ₹1200. It goes up by 10%. What is the new price (in ₹)?
  4. 4.The price of a school bag changes from ₹960 to ₹816. By what percent did it come down?
  5. 5.The price of a school bag changes from ₹1960 to ₹1372. By what percent did it come down?
  6. 6.The price of a bicycle is ₹2860. It goes up by 50%. What is the new price (in ₹)?
  7. 7.A price comes down by 30% and then comes down by 10% more. By what percent has it come down in all? =
  8. 8.A shop sells 1140 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  9. 9.A price goes up by 30% and then goes up by 40% more. By what percent has it gone up in all? =
  10. 10.The price of a school bag changes from ₹4200 to ₹3990. By what percent did it come down?
  11. 11.The price of a bicycle is ₹1480. It goes up by 20%. What is the new price (in ₹)?
  12. 12.The price of a school bag changes from ₹2120 to ₹2332. By what percent did it go up?
  13. 13.A price goes up by 50% and then comes down by 5%. By what percent has it gone up in all? =
  14. 14.A price comes down by 25% and then comes down by 15% more. By what percent has it come down in all? =
  15. 15.A water tank holds 2460 litres. 15% of the water is used. How many litres are left?
  16. 16.A water tank holds 3820 litres. 15% of the water is used. How many litres are left?
  17. 17.A price goes up by 50% and then goes up by 40% more. By what percent has it gone up in all? =
  18. 18.The price of a bicycle is ₹3380. It goes up by 15%. What is the new price (in ₹)?
  19. 19.A water tank holds 3120 litres. 30% of the water is used. How many litres are left?
  20. 20.A water tank holds 1400 litres. 40% of the water is used. How many litres are left?
  21. 21.A water tank holds 2660 litres. 15% of the water is used. How many litres are left?
  22. 22.A water tank holds 100 litres. 25% of the water is used. How many litres are left?
  23. 23.A water tank holds 4720 litres. 15% of the water is used. How many litres are left?
  24. 24.A price goes up by 40% and then comes down by 10%. By what percent has it gone up in all? =
  25. 25.A town has 460 people. Its population grows by 10%. How many people live there now?
  26. 26.A town has 140 people. Its population grows by 25%. How many people live there now?
  27. 27.The price of a school bag changes from ₹3320 to ₹2988. By what percent did it come down?
  28. 28.A shop sells 2340 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  29. 29.A town has 280 people. Its population grows by 25%. How many people live there now?
  30. 30.The price of a school bag changes from ₹1500 to ₹1050. By what percent did it come down?
  31. 31.A water tank holds 260 litres. 20% of the water is used. How many litres are left?
  32. 32.A shop sells 3760 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  33. 33.A water tank holds 820 litres. 15% of the water is used. How many litres are left?
  34. 34.A price comes down by 15% and then comes down by 50% more. By what percent has it come down in all? =
  35. 35.The price of a bicycle is ₹1480. It goes up by 30%. What is the new price (in ₹)?
  36. 36.The price of a school bag changes from ₹4680 to ₹2340. By what percent did it come down?
  37. 37.A price goes up by 25% and then goes up by 40% more. By what percent has it gone up in all? =
  38. 38.A water tank holds 3180 litres. 10% of the water is used. How many litres are left?
  39. 39.The price of a bicycle is ₹2920. It goes up by 20%. What is the new price (in ₹)?
  40. 40.A water tank holds 2140 litres. 10% of the water is used. How many litres are left?

Answer key

  1. 425
  2. 5430
  3. 1320
  4. 15
  5. 30
  6. 4290
  7. 37
  8. 1197
  9. 82
  10. 5
  11. 1776
  12. 10
  13. 42.5
  14. 36.25
  15. 2091
  16. 3247
  17. 110
  18. 3887
  19. 2184
  20. 840
  21. 2261
  22. 75
  23. 4012
  24. 26
  25. 506
  26. 175
  27. 10
  28. 2808
  29. 350
  30. 30
  31. 208
  32. 3948
  33. 697
  34. 57.5
  35. 1924
  36. 50
  37. 75
  38. 2862
  39. 3504
  40. 1926

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