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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 71 · 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 ₹4060 to ₹2436. By what percent did it come down?
  2. 2.The price of a school bag changes from ₹5000 to ₹4250. By what percent did it come down?
  3. 3.A price goes up by 25% and then goes up by 30% more. By what percent has it gone up in all? =
  4. 4.The price of a bicycle is ₹4800. It goes up by 20%. What is the new price (in ₹)?
  5. 5.The price of a school bag changes from ₹4540 to ₹4086. By what percent did it come down?
  6. 6.A water tank holds 3660 litres. 25% of the water is used. How many litres are left?
  7. 7.The price of a school bag changes from ₹3120 to ₹4680. By what percent did it go up?
  8. 8.A water tank holds 1460 litres. 5% of the water is used. How many litres are left?
  9. 9.A water tank holds 4840 litres. 40% of the water is used. How many litres are left?
  10. 10.The price of a bicycle is ₹4160. It goes up by 15%. What is the new price (in ₹)?
  11. 11.A town has 3380 people. Its population grows by 25%. How many people live there now?
  12. 12.A town has 1100 people. Its population grows by 10%. How many people live there now?
  13. 13.A water tank holds 780 litres. 30% of the water is used. How many litres are left?
  14. 14.The price of a school bag changes from ₹3940 to ₹2758. By what percent did it come down?
  15. 15.A water tank holds 1020 litres. 5% of the water is used. How many litres are left?
  16. 16.The price of a bicycle is ₹2160. It goes up by 5%. What is the new price (in ₹)?
  17. 17.A water tank holds 4640 litres. 5% of the water is used. How many litres are left?
  18. 18.A water tank holds 1220 litres. 20% of the water is used. How many litres are left?
  19. 19.A price comes down by 15% and then comes down by 10% more. By what percent has it come down in all? =
  20. 20.A water tank holds 840 litres. 25% of the water is used. How many litres are left?
  21. 21.A water tank holds 5000 litres. 40% of the water is used. How many litres are left?
  22. 22.The price of a school bag changes from ₹4460 to ₹3345. By what percent did it come down?
  23. 23.The price of a school bag changes from ₹1360 to ₹1904. By what percent did it go up?
  24. 24.A price comes down by 15% and then comes down by 25% more. By what percent has it come down in all? =
  25. 25.A water tank holds 800 litres. 30% of the water is used. How many litres are left?
  26. 26.The price of a school bag changes from ₹2380 to ₹2261. By what percent did it come down?
  27. 27.A shop sells 100 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  28. 28.A shop sells 2780 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  29. 29.A price comes down by 25% and then comes down by 5% more. By what percent has it come down in all? =
  30. 30.A price goes up by 40% and then goes up by 30% more. By what percent has it gone up in all? =
  31. 31.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =
  32. 32.A water tank holds 3060 litres. 50% of the water is used. How many litres are left?
  33. 33.A water tank holds 1880 litres. 30% of the water is used. How many litres are left?
  34. 34.A water tank holds 2800 litres. 50% of the water is used. How many litres are left?
  35. 35.The price of a school bag changes from ₹2900 to ₹2175. By what percent did it come down?
  36. 36.A price goes up by 15% and then goes up by 15% more. By what percent has it gone up in all? =
  37. 37.A water tank holds 1640 litres. 50% of the water is used. How many litres are left?
  38. 38.A shop sells 4100 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  39. 39.A shop sells 2980 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  40. 40.A water tank holds 4980 litres. 50% of the water is used. How many litres are left?

Answer key

  1. 40
  2. 15
  3. 62.5
  4. 5760
  5. 10
  6. 2745
  7. 50
  8. 1387
  9. 2904
  10. 4784
  11. 4225
  12. 1210
  13. 546
  14. 30
  15. 969
  16. 2268
  17. 4408
  18. 976
  19. 23.5
  20. 630
  21. 3000
  22. 25
  23. 40
  24. 36.25
  25. 560
  26. 5
  27. 110
  28. 2919
  29. 28.75
  30. 82
  31. 37.5
  32. 1530
  33. 1316
  34. 1400
  35. 25
  36. 32.25
  37. 820
  38. 5330
  39. 3725
  40. 2490

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