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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 757 · 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 1540 litres. 10% of the water is used. How many litres are left?
  2. 2.A price comes down by 10% and then comes down by 30% more. By what percent has it come down in all? =
  3. 3.A water tank holds 2760 litres. 15% of the water is used. How many litres are left?
  4. 4.The price of a school bag changes from ₹2920 to ₹3650. By what percent did it go up?
  5. 5.A price goes up by 40% and then comes down by 20%. By what percent has it gone up in all? =
  6. 6.A water tank holds 1480 litres. 5% of the water is used. How many litres are left?
  7. 7.A town has 3740 people. Its population grows by 15%. How many people live there now?
  8. 8.A price comes down by 15% and then comes down by 30% more. By what percent has it come down in all? =
  9. 9.The price of a school bag changes from ₹1160 to ₹1044. By what percent did it come down?
  10. 10.The price of a school bag changes from ₹1580 to ₹1738. By what percent did it go up?
  11. 11.A shop sells 1300 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  12. 12.A price goes up by 30% and then comes down by 10%. By what percent has it gone up in all? =
  13. 13.The price of a school bag changes from ₹1960 to ₹2156. By what percent did it go up?
  14. 14.A shop sells 2300 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  15. 15.A price goes up by 25% and then goes up by 30% more. By what percent has it gone up in all? =
  16. 16.A water tank holds 1460 litres. 50% of the water is used. How many litres are left?
  17. 17.A town has 3860 people. Its population grows by 20%. How many people live there now?
  18. 18.A price goes up by 50% and then comes down by 10%. By what percent has it gone up in all? =
  19. 19.A water tank holds 4680 litres. 10% of the water is used. How many litres are left?
  20. 20.The price of a bicycle is ₹2740. It goes up by 20%. What is the new price (in ₹)?
  21. 21.A water tank holds 960 litres. 20% of the water is used. How many litres are left?
  22. 22.A water tank holds 400 litres. 10% of the water is used. How many litres are left?
  23. 23.The price of a school bag changes from ₹2300 to ₹2530. By what percent did it go up?
  24. 24.The price of a school bag changes from ₹800 to ₹880. By what percent did it go up?
  25. 25.The price of a bicycle is ₹460. It goes up by 15%. What is the new price (in ₹)?
  26. 26.The price of a school bag changes from ₹340 to ₹323. By what percent did it come down?
  27. 27.A price comes down by 30% and then comes down by 10% more. By what percent has it come down in all? =
  28. 28.The price of a school bag changes from ₹3960 to ₹3564. By what percent did it come down?
  29. 29.A water tank holds 1040 litres. 50% of the water is used. How many litres are left?
  30. 30.A price goes up by 30% and then comes down by 15%. By what percent has it gone up in all? =
  31. 31.A price goes up by 20% and then goes up by 20% more. By what percent has it gone up in all? =
  32. 32.A water tank holds 2300 litres. 10% of the water is used. How many litres are left?
  33. 33.The price of a school bag changes from ₹1000 to ₹1500. By what percent did it go up?
  34. 34.A price comes down by 20% and then comes down by 50% more. By what percent has it come down in all? =
  35. 35.The price of a bicycle is ₹4340. It goes up by 50%. What is the new price (in ₹)?
  36. 36.The price of a bicycle is ₹1600. It goes up by 10%. What is the new price (in ₹)?
  37. 37.A water tank holds 460 litres. 25% of the water is used. How many litres are left?
  38. 38.A price goes up by 25% and then goes up by 15% more. By what percent has it gone up in all? =
  39. 39.A town has 280 people. Its population grows by 5%. How many people live there now?
  40. 40.The price of a bicycle is ₹2340. It goes up by 10%. What is the new price (in ₹)?

Answer key

  1. 1386
  2. 37
  3. 2346
  4. 25
  5. 12
  6. 1406
  7. 4301
  8. 40.5
  9. 10
  10. 10
  11. 1690
  12. 17
  13. 10
  14. 2415
  15. 62.5
  16. 730
  17. 4632
  18. 35
  19. 4212
  20. 3288
  21. 768
  22. 360
  23. 10
  24. 10
  25. 529
  26. 5
  27. 37
  28. 10
  29. 520
  30. 10.5
  31. 44
  32. 2070
  33. 50
  34. 60
  35. 6510
  36. 1760
  37. 345
  38. 43.75
  39. 294
  40. 2574

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