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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 675 · 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 bicycle is ₹960. It goes up by 50%. What is the new price (in ₹)?
  2. 2.The price of a school bag changes from ₹3720 to ₹3534. By what percent did it come down?
  3. 3.A water tank holds 360 litres. 15% of the water is used. How many litres are left?
  4. 4.The price of a bicycle is ₹1820. It goes up by 10%. What is the new price (in ₹)?
  5. 5.The price of a bicycle is ₹3500. It goes up by 30%. What is the new price (in ₹)?
  6. 6.A town has 780 people. Its population grows by 25%. How many people live there now?
  7. 7.A water tank holds 3920 litres. 15% of the water is used. How many litres are left?
  8. 8.A water tank holds 760 litres. 10% of the water is used. How many litres are left?
  9. 9.The price of a school bag changes from ₹2940 to ₹1764. By what percent did it come down?
  10. 10.The price of a school bag changes from ₹580 to ₹696. By what percent did it go up?
  11. 11.A shop sells 1960 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  12. 12.The price of a school bag changes from ₹3060 to ₹2601. By what percent did it come down?
  13. 13.A town has 2520 people. Its population grows by 25%. How many people live there now?
  14. 14.The price of a school bag changes from ₹4380 to ₹3504. By what percent did it come down?
  15. 15.The price of a bicycle is ₹4340. It goes up by 5%. What is the new price (in ₹)?
  16. 16.A town has 3060 people. Its population grows by 25%. How many people live there now?
  17. 17.A water tank holds 1780 litres. 20% of the water is used. How many litres are left?
  18. 18.The price of a bicycle is ₹4900. It goes up by 30%. What is the new price (in ₹)?
  19. 19.The price of a school bag changes from ₹3760 to ₹5640. By what percent did it go up?
  20. 20.The price of a school bag changes from ₹1480 to ₹1036. By what percent did it come down?
  21. 21.A water tank holds 1780 litres. 10% of the water is used. How many litres are left?
  22. 22.A price goes up by 40% and then goes up by 30% more. By what percent has it gone up in all? =
  23. 23.A town has 1960 people. Its population grows by 40%. How many people live there now?
  24. 24.The price of a school bag changes from ₹4380 to ₹6570. By what percent did it go up?
  25. 25.A water tank holds 1980 litres. 30% of the water is used. How many litres are left?
  26. 26.The price of a school bag changes from ₹1260 to ₹630. By what percent did it come down?
  27. 27.A town has 2460 people. Its population grows by 10%. How many people live there now?
  28. 28.The price of a school bag changes from ₹2380 to ₹2261. By what percent did it come down?
  29. 29.The price of a school bag changes from ₹2400 to ₹2760. By what percent did it go up?
  30. 30.A water tank holds 120 litres. 20% of the water is used. How many litres are left?
  31. 31.A water tank holds 4900 litres. 20% of the water is used. How many litres are left?
  32. 32.A town has 3540 people. Its population grows by 30%. How many people live there now?
  33. 33.A price goes up by 30% and then goes up by 25% more. By what percent has it gone up in all? =
  34. 34.The price of a bicycle is ₹4320. It goes up by 30%. What is the new price (in ₹)?
  35. 35.A price comes down by 15% and then comes down by 5% more. By what percent has it come down in all? =
  36. 36.The price of a school bag changes from ₹1780 to ₹2670. By what percent did it go up?
  37. 37.A water tank holds 1820 litres. 15% of the water is used. How many litres are left?
  38. 38.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =
  39. 39.A shop sells 4460 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  40. 40.A town has 3080 people. Its population grows by 5%. How many people live there now?

Answer key

  1. 1440
  2. 5
  3. 306
  4. 2002
  5. 4550
  6. 975
  7. 3332
  8. 684
  9. 40
  10. 20
  11. 2352
  12. 15
  13. 3150
  14. 20
  15. 4557
  16. 3825
  17. 1424
  18. 6370
  19. 50
  20. 30
  21. 1602
  22. 82
  23. 2744
  24. 50
  25. 1386
  26. 50
  27. 2706
  28. 5
  29. 15
  30. 96
  31. 3920
  32. 4602
  33. 62.5
  34. 5616
  35. 19.25
  36. 50
  37. 1547
  38. 37.5
  39. 6690
  40. 3234

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