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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 207 · 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 3480 litres. 5% of the water is used. How many litres are left?
  2. 2.The price of a school bag changes from ₹560 to ₹672. By what percent did it go up?
  3. 3.The price of a school bag changes from ₹720 to ₹432. By what percent did it come down?
  4. 4.A shop sells 1320 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  5. 5.The price of a school bag changes from ₹1200 to ₹720. By what percent did it come down?
  6. 6.A water tank holds 3720 litres. 20% of the water is used. How many litres are left?
  7. 7.A water tank holds 2380 litres. 5% of the water is used. How many litres are left?
  8. 8.A water tank holds 3360 litres. 30% of the water is used. How many litres are left?
  9. 9.A price goes up by 30% and then goes up by 50% more. By what percent has it gone up in all? =
  10. 10.A price goes up by 25% and then goes up by 50% more. By what percent has it gone up in all? =
  11. 11.A price comes down by 40% and then comes down by 20% more. By what percent has it come down in all? =
  12. 12.A price goes up by 40% and then comes down by 5%. By what percent has it gone up in all? =
  13. 13.A price goes up by 30% and then goes up by 30% more. By what percent has it gone up in all? =
  14. 14.A water tank holds 3780 litres. 10% of the water is used. How many litres are left?
  15. 15.A price goes up by 5% and then goes up by 40% more. By what percent has it gone up in all? =
  16. 16.The price of a school bag changes from ₹2900 to ₹2030. By what percent did it come down?
  17. 17.A shop sells 2880 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  18. 18.A town has 4620 people. Its population grows by 50%. How many people live there now?
  19. 19.A water tank holds 1920 litres. 15% of the water is used. How many litres are left?
  20. 20.The price of a bicycle is ₹2140. It goes up by 10%. What is the new price (in ₹)?
  21. 21.A price goes up by 25% and then goes up by 25% more. By what percent has it gone up in all? =
  22. 22.A price goes up by 40% and then goes up by 5% more. By what percent has it gone up in all? =
  23. 23.The price of a school bag changes from ₹1260 to ₹1071. By what percent did it come down?
  24. 24.The price of a school bag changes from ₹1400 to ₹1610. By what percent did it go up?
  25. 25.A price goes up by 10% and then goes up by 20% more. By what percent has it gone up in all? =
  26. 26.A price comes down by 25% and then comes down by 25% more. By what percent has it come down in all? =
  27. 27.A shop sells 2500 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  28. 28.A price comes down by 50% and then comes down by 25% more. By what percent has it come down in all? =
  29. 29.A price goes up by 50% and then goes up by 20% more. By what percent has it gone up in all? =
  30. 30.The price of a bicycle is ₹300. It goes up by 30%. What is the new price (in ₹)?
  31. 31.The price of a school bag changes from ₹1280 to ₹1792. By what percent did it go up?
  32. 32.A water tank holds 240 litres. 5% of the water is used. How many litres are left?
  33. 33.A water tank holds 3820 litres. 5% of the water is used. How many litres are left?
  34. 34.The price of a school bag changes from ₹3100 to ₹4340. By what percent did it go up?
  35. 35.A price comes down by 50% and then comes down by 40% more. By what percent has it come down in all? =
  36. 36.A price comes down by 15% and then comes down by 20% more. By what percent has it come down in all? =
  37. 37.A shop sells 4980 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  38. 38.A town has 4800 people. Its population grows by 25%. How many people live there now?
  39. 39.The price of a school bag changes from ₹1280 to ₹1344. By what percent did it go up?
  40. 40.The price of a bicycle is ₹2640. It goes up by 5%. What is the new price (in ₹)?

Answer key

  1. 3306
  2. 20
  3. 40
  4. 1452
  5. 40
  6. 2976
  7. 2261
  8. 2352
  9. 95
  10. 87.5
  11. 52
  12. 33
  13. 69
  14. 3402
  15. 47
  16. 30
  17. 4032
  18. 6930
  19. 1632
  20. 2354
  21. 56.25
  22. 47
  23. 15
  24. 15
  25. 32
  26. 43.75
  27. 2875
  28. 62.5
  29. 80
  30. 390
  31. 40
  32. 228
  33. 3629
  34. 40
  35. 70
  36. 32
  37. 6225
  38. 6000
  39. 5
  40. 2772

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