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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 554 · 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 1100 litres. 15% of the water is used. How many litres are left?
  2. 2.A water tank holds 4240 litres. 50% of the water is used. How many litres are left?
  3. 3.A town has 3380 people. Its population grows by 20%. How many people live there now?
  4. 4.The price of a bicycle is ₹4700. It goes up by 25%. What is the new price (in ₹)?
  5. 5.A price goes up by 50% and then goes up by 10% more. By what percent has it gone up in all? =
  6. 6.A price goes up by 25% and then goes up by 10% more. By what percent has it gone up in all? =
  7. 7.A price comes down by 30% and then comes down by 10% more. By what percent has it come down in all? =
  8. 8.A town has 1420 people. Its population grows by 40%. How many people live there now?
  9. 9.A water tank holds 2160 litres. 10% of the water is used. How many litres are left?
  10. 10.A water tank holds 920 litres. 5% of the water is used. How many litres are left?
  11. 11.A shop sells 3020 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  12. 12.A price goes up by 10% and then goes up by 50% more. By what percent has it gone up in all? =
  13. 13.The price of a school bag changes from ₹2460 to ₹2583. By what percent did it go up?
  14. 14.The price of a school bag changes from ₹4680 to ₹4212. By what percent did it come down?
  15. 15.A water tank holds 3240 litres. 25% of the water is used. How many litres are left?
  16. 16.The price of a school bag changes from ₹3920 to ₹3724. By what percent did it come down?
  17. 17.A shop sells 360 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  18. 18.The price of a school bag changes from ₹240 to ₹216. By what percent did it come down?
  19. 19.The price of a school bag changes from ₹1180 to ₹708. By what percent did it come down?
  20. 20.A shop sells 2780 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  21. 21.The price of a school bag changes from ₹3560 to ₹4984. By what percent did it go up?
  22. 22.A water tank holds 4220 litres. 20% of the water is used. How many litres are left?
  23. 23.The price of a school bag changes from ₹3920 to ₹4508. By what percent did it go up?
  24. 24.The price of a school bag changes from ₹1200 to ₹840. By what percent did it come down?
  25. 25.A shop sells 620 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  26. 26.A water tank holds 1440 litres. 20% of the water is used. How many litres are left?
  27. 27.A price goes up by 10% and then comes down by 5%. By what percent has it gone up in all? =
  28. 28.A town has 4220 people. Its population grows by 10%. How many people live there now?
  29. 29.The price of a school bag changes from ₹3580 to ₹3759. By what percent did it go up?
  30. 30.A water tank holds 1740 litres. 25% of the water is used. How many litres are left?
  31. 31.The price of a school bag changes from ₹4120 to ₹3296. By what percent did it come down?
  32. 32.The price of a school bag changes from ₹3440 to ₹2064. By what percent did it come down?
  33. 33.A water tank holds 4920 litres. 25% of the water is used. How many litres are left?
  34. 34.A town has 3420 people. Its population grows by 10%. How many people live there now?
  35. 35.A town has 1760 people. Its population grows by 15%. How many people live there now?
  36. 36.The price of a bicycle is ₹3360. It goes up by 10%. What is the new price (in ₹)?
  37. 37.The price of a school bag changes from ₹1960 to ₹1666. By what percent did it come down?
  38. 38.A price comes down by 10% and then comes down by 10% more. By what percent has it come down in all? =
  39. 39.The price of a school bag changes from ₹2140 to ₹1712. By what percent did it come down?
  40. 40.The price of a school bag changes from ₹640 to ₹320. By what percent did it come down?

Answer key

  1. 935
  2. 2120
  3. 4056
  4. 5875
  5. 65
  6. 37.5
  7. 37
  8. 1988
  9. 1944
  10. 874
  11. 3624
  12. 65
  13. 5
  14. 10
  15. 2430
  16. 5
  17. 396
  18. 10
  19. 40
  20. 3058
  21. 40
  22. 3376
  23. 15
  24. 30
  25. 806
  26. 1152
  27. 4.5
  28. 4642
  29. 5
  30. 1305
  31. 20
  32. 40
  33. 3690
  34. 3762
  35. 2024
  36. 3696
  37. 15
  38. 19
  39. 20
  40. 50

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