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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 927 · 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 price goes up by 10% and then comes down by 5%. By what percent has it gone up in all? =
  2. 2.The price of a bicycle is ₹2960. It goes up by 10%. What is the new price (in ₹)?
  3. 3.The price of a school bag changes from ₹3820 to ₹2292. By what percent did it come down?
  4. 4.The price of a school bag changes from ₹2320 to ₹3480. By what percent did it go up?
  5. 5.A water tank holds 680 litres. 40% of the water is used. How many litres are left?
  6. 6.The price of a school bag changes from ₹3180 to ₹1908. By what percent did it come down?
  7. 7.A water tank holds 3900 litres. 10% of the water is used. How many litres are left?
  8. 8.A water tank holds 2900 litres. 25% of the water is used. How many litres are left?
  9. 9.A shop sells 3200 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  10. 10.A price goes up by 15% and then comes down by 10%. By what percent has it gone up in all? =
  11. 11.The price of a school bag changes from ₹2440 to ₹1220. By what percent did it come down?
  12. 12.The price of a school bag changes from ₹2160 to ₹1728. By what percent did it come down?
  13. 13.The price of a school bag changes from ₹2660 to ₹1330. By what percent did it come down?
  14. 14.A price comes down by 25% and then comes down by 15% more. By what percent has it come down in all? =
  15. 15.The price of a school bag changes from ₹960 to ₹672. By what percent did it come down?
  16. 16.A water tank holds 1300 litres. 25% of the water is used. How many litres are left?
  17. 17.A town has 580 people. Its population grows by 25%. How many people live there now?
  18. 18.A town has 1180 people. Its population grows by 20%. How many people live there now?
  19. 19.A town has 1780 people. Its population grows by 40%. How many people live there now?
  20. 20.The price of a bicycle is ₹1660. It goes up by 20%. What is the new price (in ₹)?
  21. 21.A price comes down by 50% and then comes down by 5% more. By what percent has it come down in all? =
  22. 22.A water tank holds 3840 litres. 30% of the water is used. How many litres are left?
  23. 23.A water tank holds 4720 litres. 10% of the water is used. How many litres are left?
  24. 24.A price goes up by 40% and then goes up by 20% more. By what percent has it gone up in all? =
  25. 25.The price of a bicycle is ₹4300. It goes up by 10%. What is the new price (in ₹)?
  26. 26.A price comes down by 50% and then comes down by 15% more. By what percent has it come down in all? =
  27. 27.A water tank holds 1420 litres. 5% of the water is used. How many litres are left?
  28. 28.The price of a bicycle is ₹1300. It goes up by 40%. What is the new price (in ₹)?
  29. 29.A water tank holds 3320 litres. 10% of the water is used. How many litres are left?
  30. 30.A water tank holds 720 litres. 25% of the water is used. How many litres are left?
  31. 31.A shop sells 2020 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  32. 32.A price goes up by 50% and then goes up by 30% more. By what percent has it gone up in all? =
  33. 33.A water tank holds 2480 litres. 10% of the water is used. How many litres are left?
  34. 34.A shop sells 4220 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  35. 35.A price comes down by 40% and then comes down by 15% more. By what percent has it come down in all? =
  36. 36.A water tank holds 840 litres. 20% of the water is used. How many litres are left?
  37. 37.A shop sells 560 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  38. 38.The price of a school bag changes from ₹3820 to ₹4202. By what percent did it go up?
  39. 39.A water tank holds 3760 litres. 40% of the water is used. How many litres are left?
  40. 40.A price comes down by 30% and then comes down by 50% more. By what percent has it come down in all? =

Answer key

  1. 4.5
  2. 3256
  3. 40
  4. 50
  5. 408
  6. 40
  7. 3510
  8. 2175
  9. 3840
  10. 3.5
  11. 50
  12. 20
  13. 50
  14. 36.25
  15. 30
  16. 975
  17. 725
  18. 1416
  19. 2492
  20. 1992
  21. 52.5
  22. 2688
  23. 4248
  24. 68
  25. 4730
  26. 57.5
  27. 1349
  28. 1820
  29. 2988
  30. 540
  31. 2222
  32. 95
  33. 2232
  34. 5064
  35. 49
  36. 672
  37. 728
  38. 10
  39. 2256
  40. 65

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