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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 441 · 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 15% and then goes up by 20% more. By what percent has it gone up in all? =
  2. 2.A water tank holds 460 litres. 50% of the water is used. How many litres are left?
  3. 3.A price comes down by 30% and then comes down by 10% more. By what percent has it come down in all? =
  4. 4.A water tank holds 3920 litres. 25% of the water is used. How many litres are left?
  5. 5.The price of a school bag changes from ₹4040 to ₹3636. By what percent did it come down?
  6. 6.A town has 1960 people. Its population grows by 50%. How many people live there now?
  7. 7.A water tank holds 4440 litres. 10% of the water is used. How many litres are left?
  8. 8.A town has 4260 people. Its population grows by 50%. How many people live there now?
  9. 9.The price of a school bag changes from ₹680 to ₹714. By what percent did it go up?
  10. 10.A shop sells 3560 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  11. 11.A price comes down by 15% and then comes down by 15% more. By what percent has it come down in all? =
  12. 12.A town has 1960 people. Its population grows by 5%. How many people live there now?
  13. 13.A shop sells 220 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  14. 14.A price goes up by 50% and then goes up by 30% more. By what percent has it gone up in all? =
  15. 15.A shop sells 3720 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  16. 16.A price goes up by 30% and then goes up by 40% more. By what percent has it gone up in all? =
  17. 17.The price of a school bag changes from ₹1400 to ₹1540. By what percent did it go up?
  18. 18.A water tank holds 220 litres. 20% of the water is used. How many litres are left?
  19. 19.A water tank holds 2880 litres. 50% of the water is used. How many litres are left?
  20. 20.A price goes up by 30% and then comes down by 20%. By what percent has it gone up in all? =
  21. 21.A water tank holds 2600 litres. 5% of the water is used. How many litres are left?
  22. 22.The price of a school bag changes from ₹720 to ₹1008. By what percent did it go up?
  23. 23.The price of a school bag changes from ₹3880 to ₹4268. By what percent did it go up?
  24. 24.A shop sells 3160 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  25. 25.A town has 1720 people. Its population grows by 40%. How many people live there now?
  26. 26.A price comes down by 10% and then comes down by 5% more. By what percent has it come down in all? =
  27. 27.A shop sells 2040 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  28. 28.A water tank holds 1820 litres. 25% of the water is used. How many litres are left?
  29. 29.The price of a school bag changes from ₹980 to ₹686. By what percent did it come down?
  30. 30.A price goes up by 15% and then goes up by 25% more. By what percent has it gone up in all? =
  31. 31.The price of a bicycle is ₹2100. It goes up by 25%. What is the new price (in ₹)?
  32. 32.The price of a school bag changes from ₹260 to ₹130. By what percent did it come down?
  33. 33.A water tank holds 1080 litres. 5% of the water is used. How many litres are left?
  34. 34.A shop sells 2320 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  35. 35.A water tank holds 3820 litres. 25% of the water is used. How many litres are left?
  36. 36.The price of a school bag changes from ₹4200 to ₹3360. By what percent did it come down?
  37. 37.A price goes up by 30% and then comes down by 15%. By what percent has it gone up in all? =
  38. 38.A water tank holds 2720 litres. 30% of the water is used. How many litres are left?
  39. 39.A price comes down by 5% and then comes down by 25% more. By what percent has it come down in all? =
  40. 40.A price goes up by 25% and then comes down by 5%. By what percent has it gone up in all? =

Answer key

  1. 38
  2. 230
  3. 37
  4. 2940
  5. 10
  6. 2940
  7. 3996
  8. 6390
  9. 5
  10. 4094
  11. 27.75
  12. 2058
  13. 286
  14. 95
  15. 5208
  16. 82
  17. 10
  18. 176
  19. 1440
  20. 4
  21. 2470
  22. 40
  23. 10
  24. 3476
  25. 2408
  26. 14.5
  27. 2142
  28. 1365
  29. 30
  30. 43.75
  31. 2625
  32. 50
  33. 1026
  34. 3480
  35. 2865
  36. 20
  37. 10.5
  38. 1904
  39. 28.75
  40. 18.75

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