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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 97 · 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 school bag changes from ₹220 to ₹253. By what percent did it go up?
  2. 2.A price goes up by 10% and then goes up by 15% more. By what percent has it gone up in all? =
  3. 3.The price of a bicycle is ₹1260. It goes up by 10%. What is the new price (in ₹)?
  4. 4.A shop sells 1500 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  5. 5.A water tank holds 2120 litres. 10% of the water is used. How many litres are left?
  6. 6.A water tank holds 1980 litres. 10% of the water is used. How many litres are left?
  7. 7.The price of a school bag changes from ₹4020 to ₹3216. By what percent did it come down?
  8. 8.The price of a school bag changes from ₹3420 to ₹3933. By what percent did it go up?
  9. 9.The price of a school bag changes from ₹4160 to ₹5408. By what percent did it go up?
  10. 10.A town has 3960 people. Its population grows by 30%. How many people live there now?
  11. 11.A water tank holds 4720 litres. 5% of the water is used. How many litres are left?
  12. 12.A water tank holds 3380 litres. 10% of the water is used. How many litres are left?
  13. 13.The price of a school bag changes from ₹120 to ₹132. By what percent did it go up?
  14. 14.A town has 4260 people. Its population grows by 10%. How many people live there now?
  15. 15.The price of a bicycle is ₹3340. It goes up by 15%. What is the new price (in ₹)?
  16. 16.The price of a school bag changes from ₹120 to ₹60. By what percent did it come down?
  17. 17.A price goes up by 30% and then comes down by 5%. By what percent has it gone up in all? =
  18. 18.A price goes up by 15% and then goes up by 25% more. By what percent has it gone up in all? =
  19. 19.A price goes up by 30% and then goes up by 20% more. By what percent has it gone up in all? =
  20. 20.A water tank holds 2680 litres. 50% of the water is used. How many litres are left?
  21. 21.The price of a school bag changes from ₹1960 to ₹2548. By what percent did it go up?
  22. 22.A town has 2020 people. Its population grows by 30%. How many people live there now?
  23. 23.A water tank holds 1020 litres. 25% of the water is used. How many litres are left?
  24. 24.The price of a school bag changes from ₹1140 to ₹570. By what percent did it come down?
  25. 25.A water tank holds 1300 litres. 15% of the water is used. How many litres are left?
  26. 26.A price comes down by 50% and then comes down by 15% more. By what percent has it come down in all? =
  27. 27.A price comes down by 20% and then comes down by 5% more. By what percent has it come down in all? =
  28. 28.A water tank holds 860 litres. 5% of the water is used. How many litres are left?
  29. 29.A water tank holds 440 litres. 20% of the water is used. How many litres are left?
  30. 30.A water tank holds 3640 litres. 15% of the water is used. How many litres are left?
  31. 31.The price of a bicycle is ₹2120. It goes up by 40%. What is the new price (in ₹)?
  32. 32.A water tank holds 1780 litres. 15% of the water is used. How many litres are left?
  33. 33.The price of a school bag changes from ₹380 to ₹570. By what percent did it go up?
  34. 34.A shop sells 500 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  35. 35.The price of a school bag changes from ₹840 to ₹1176. By what percent did it go up?
  36. 36.A water tank holds 4500 litres. 10% of the water is used. How many litres are left?
  37. 37.The price of a bicycle is ₹1980. It goes up by 40%. What is the new price (in ₹)?
  38. 38.The price of a school bag changes from ₹3280 to ₹3772. By what percent did it go up?
  39. 39.A water tank holds 1780 litres. 5% of the water is used. How many litres are left?
  40. 40.A price comes down by 50% and then comes down by 40% more. By what percent has it come down in all? =

Answer key

  1. 15
  2. 26.5
  3. 1386
  4. 1650
  5. 1908
  6. 1782
  7. 20
  8. 15
  9. 30
  10. 5148
  11. 4484
  12. 3042
  13. 10
  14. 4686
  15. 3841
  16. 50
  17. 23.5
  18. 43.75
  19. 56
  20. 1340
  21. 30
  22. 2626
  23. 765
  24. 50
  25. 1105
  26. 57.5
  27. 24
  28. 817
  29. 352
  30. 3094
  31. 2968
  32. 1513
  33. 50
  34. 750
  35. 40
  36. 4050
  37. 2772
  38. 15
  39. 1691
  40. 70

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