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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 800 · 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 shop sells 1560 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  2. 2.A town has 280 people. Its population grows by 25%. How many people live there now?
  3. 3.A water tank holds 2460 litres. 15% of the water is used. How many litres are left?
  4. 4.The price of a bicycle is ₹4200. It goes up by 15%. What is the new price (in ₹)?
  5. 5.A water tank holds 2800 litres. 10% of the water is used. How many litres are left?
  6. 6.A town has 740 people. Its population grows by 25%. How many people live there now?
  7. 7.A town has 2060 people. Its population grows by 5%. How many people live there now?
  8. 8.A water tank holds 600 litres. 50% of the water is used. How many litres are left?
  9. 9.The price of a school bag changes from ₹540 to ₹486. By what percent did it come down?
  10. 10.The price of a school bag changes from ₹2840 to ₹2414. By what percent did it come down?
  11. 11.A water tank holds 180 litres. 15% of the water is used. How many litres are left?
  12. 12.A price goes up by 20% and then goes up by 10% more. By what percent has it gone up in all? =
  13. 13.The price of a bicycle is ₹3400. It goes up by 10%. What is the new price (in ₹)?
  14. 14.A price goes up by 40% and then comes down by 5%. By what percent has it gone up in all? =
  15. 15.A price goes up by 50% and then goes up by 15% more. By what percent has it gone up in all? =
  16. 16.The price of a school bag changes from ₹3060 to ₹4590. By what percent did it go up?
  17. 17.The price of a school bag changes from ₹4780 to ₹5258. By what percent did it go up?
  18. 18.The price of a school bag changes from ₹360 to ₹306. By what percent did it come down?
  19. 19.The price of a bicycle is ₹4920. It goes up by 15%. What is the new price (in ₹)?
  20. 20.A shop sells 1600 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  21. 21.The price of a school bag changes from ₹1000 to ₹1150. By what percent did it go up?
  22. 22.The price of a bicycle is ₹3880. It goes up by 50%. What is the new price (in ₹)?
  23. 23.A price comes down by 20% and then comes down by 40% more. By what percent has it come down in all? =
  24. 24.The price of a school bag changes from ₹3820 to ₹5730. By what percent did it go up?
  25. 25.A water tank holds 1280 litres. 5% of the water is used. How many litres are left?
  26. 26.The price of a bicycle is ₹1480. It goes up by 40%. What is the new price (in ₹)?
  27. 27.A water tank holds 3520 litres. 15% of the water is used. How many litres are left?
  28. 28.A water tank holds 4060 litres. 20% of the water is used. How many litres are left?
  29. 29.A water tank holds 60 litres. 5% of the water is used. How many litres are left?
  30. 30.A water tank holds 2120 litres. 15% of the water is used. How many litres are left?
  31. 31.A water tank holds 660 litres. 25% of the water is used. How many litres are left?
  32. 32.The price of a school bag changes from ₹3040 to ₹3192. By what percent did it go up?
  33. 33.A water tank holds 1680 litres. 20% of the water is used. How many litres are left?
  34. 34.The price of a school bag changes from ₹1180 to ₹1298. By what percent did it go up?
  35. 35.A water tank holds 2320 litres. 25% of the water is used. How many litres are left?
  36. 36.A price goes up by 50% and then comes down by 25%. By what percent has it gone up in all? =
  37. 37.A water tank holds 3840 litres. 5% of the water is used. How many litres are left?
  38. 38.The price of a bicycle is ₹4460. It goes up by 5%. What is the new price (in ₹)?
  39. 39.A water tank holds 1660 litres. 40% of the water is used. How many litres are left?
  40. 40.A water tank holds 2320 litres. 15% of the water is used. How many litres are left?

Answer key

  1. 1638
  2. 350
  3. 2091
  4. 4830
  5. 2520
  6. 925
  7. 2163
  8. 300
  9. 10
  10. 15
  11. 153
  12. 32
  13. 3740
  14. 33
  15. 72.5
  16. 50
  17. 10
  18. 15
  19. 5658
  20. 2240
  21. 15
  22. 5820
  23. 52
  24. 50
  25. 1216
  26. 2072
  27. 2992
  28. 3248
  29. 57
  30. 1802
  31. 495
  32. 5
  33. 1344
  34. 10
  35. 1740
  36. 12.5
  37. 3648
  38. 4683
  39. 996
  40. 1972

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