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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 764 · 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 school bag changes from ₹840 to ₹588. By what percent did it come down?
  2. 2.The price of a school bag changes from ₹200 to ₹160. By what percent did it come down?
  3. 3.A water tank holds 2240 litres. 20% of the water is used. How many litres are left?
  4. 4.A price goes up by 25% and then goes up by 40% more. By what percent has it gone up in all? =
  5. 5.A town has 3700 people. Its population grows by 30%. How many people live there now?
  6. 6.A price goes up by 15% and then goes up by 20% more. By what percent has it gone up in all? =
  7. 7.A shop sells 1380 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  8. 8.A price goes up by 10% and then comes down by 5%. By what percent has it gone up in all? =
  9. 9.A water tank holds 880 litres. 10% of the water is used. How many litres are left?
  10. 10.The price of a bicycle is ₹2080. It goes up by 10%. What is the new price (in ₹)?
  11. 11.A price goes up by 10% and then goes up by 20% more. By what percent has it gone up in all? =
  12. 12.A shop sells 3060 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  13. 13.The price of a school bag changes from ₹4800 to ₹5280. By what percent did it go up?
  14. 14.The price of a school bag changes from ₹3260 to ₹2282. By what percent did it come down?
  15. 15.A water tank holds 4120 litres. 15% of the water is used. How many litres are left?
  16. 16.A price comes down by 15% and then comes down by 5% more. By what percent has it come down in all? =
  17. 17.The price of a school bag changes from ₹4200 to ₹5040. By what percent did it go up?
  18. 18.A water tank holds 300 litres. 15% of the water is used. How many litres are left?
  19. 19.A water tank holds 100 litres. 10% of the water is used. How many litres are left?
  20. 20.A water tank holds 60 litres. 10% of the water is used. How many litres are left?
  21. 21.A water tank holds 700 litres. 5% of the water is used. How many litres are left?
  22. 22.A town has 3660 people. Its population grows by 5%. How many people live there now?
  23. 23.A price comes down by 25% and then comes down by 25% more. By what percent has it come down in all? =
  24. 24.The price of a school bag changes from ₹2560 to ₹2816. By what percent did it go up?
  25. 25.A price goes up by 15% and then goes up by 10% more. By what percent has it gone up in all? =
  26. 26.A price comes down by 10% and then comes down by 50% more. By what percent has it come down in all? =
  27. 27.A price comes down by 10% and then comes down by 15% more. By what percent has it come down in all? =
  28. 28.The price of a bicycle is ₹160. It goes up by 5%. What is the new price (in ₹)?
  29. 29.The price of a school bag changes from ₹2780 to ₹2641. By what percent did it come down?
  30. 30.A water tank holds 200 litres. 40% of the water is used. How many litres are left?
  31. 31.A shop sells 780 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  32. 32.A town has 800 people. Its population grows by 25%. How many people live there now?
  33. 33.A price goes up by 25% and then goes up by 25% more. By what percent has it gone up in all? =
  34. 34.A price comes down by 10% and then comes down by 5% more. By what percent has it come down in all? =
  35. 35.The price of a school bag changes from ₹1840 to ₹2116. By what percent did it go up?
  36. 36.A town has 4120 people. Its population grows by 20%. How many people live there now?
  37. 37.A water tank holds 1440 litres. 25% of the water is used. How many litres are left?
  38. 38.A shop sells 1180 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  39. 39.The price of a school bag changes from ₹3940 to ₹3546. By what percent did it come down?
  40. 40.A water tank holds 4540 litres. 40% of the water is used. How many litres are left?

Answer key

  1. 30
  2. 20
  3. 1792
  4. 75
  5. 4810
  6. 38
  7. 1449
  8. 4.5
  9. 792
  10. 2288
  11. 32
  12. 3672
  13. 10
  14. 30
  15. 3502
  16. 19.25
  17. 20
  18. 255
  19. 90
  20. 54
  21. 665
  22. 3843
  23. 43.75
  24. 10
  25. 26.5
  26. 55
  27. 23.5
  28. 168
  29. 5
  30. 120
  31. 858
  32. 1000
  33. 56.25
  34. 14.5
  35. 15
  36. 4944
  37. 1080
  38. 1770
  39. 10
  40. 2724

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