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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 761 · 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 2060 litres. 15% of the water is used. How many litres are left?
  2. 2.A price goes up by 10% and then goes up by 15% more. By what percent has it gone up in all? =
  3. 3.A price comes down by 10% and then comes down by 20% more. By what percent has it come down in all? =
  4. 4.A price goes up by 20% and then goes up by 20% more. By what percent has it gone up in all? =
  5. 5.The price of a school bag changes from ₹4920 to ₹5166. By what percent did it go up?
  6. 6.A town has 360 people. Its population grows by 30%. How many people live there now?
  7. 7.The price of a school bag changes from ₹2760 to ₹1380. By what percent did it come down?
  8. 8.The price of a school bag changes from ₹3600 to ₹5040. By what percent did it go up?
  9. 9.A water tank holds 3180 litres. 25% of the water is used. How many litres are left?
  10. 10.A price goes up by 40% and then goes up by 15% more. By what percent has it gone up in all? =
  11. 11.A price goes up by 50% and then goes up by 50% more. By what percent has it gone up in all? =
  12. 12.A price goes up by 30% and then goes up by 10% more. By what percent has it gone up in all? =
  13. 13.A price comes down by 15% and then comes down by 20% more. By what percent has it come down in all? =
  14. 14.A price goes up by 50% and then comes down by 15%. By what percent has it gone up in all? =
  15. 15.The price of a bicycle is ₹1960. It goes up by 20%. What is the new price (in ₹)?
  16. 16.A water tank holds 4820 litres. 15% of the water is used. How many litres are left?
  17. 17.A price goes up by 5% and then goes up by 15% more. By what percent has it gone up in all? =
  18. 18.A water tank holds 2980 litres. 10% of the water is used. How many litres are left?
  19. 19.A town has 4620 people. Its population grows by 20%. How many people live there now?
  20. 20.The price of a school bag changes from ₹4080 to ₹3876. By what percent did it come down?
  21. 21.A water tank holds 4000 litres. 40% of the water is used. How many litres are left?
  22. 22.The price of a school bag changes from ₹940 to ₹658. By what percent did it come down?
  23. 23.A shop sells 4360 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  24. 24.The price of a school bag changes from ₹2180 to ₹3052. By what percent did it go up?
  25. 25.A water tank holds 2540 litres. 30% of the water is used. How many litres are left?
  26. 26.A town has 4860 people. Its population grows by 15%. How many people live there now?
  27. 27.The price of a bicycle is ₹1240. It goes up by 10%. What is the new price (in ₹)?
  28. 28.A town has 2360 people. Its population grows by 5%. How many people live there now?
  29. 29.A water tank holds 80 litres. 5% of the water is used. How many litres are left?
  30. 30.The price of a school bag changes from ₹3180 to ₹4770. By what percent did it go up?
  31. 31.A water tank holds 2880 litres. 15% of the water is used. How many litres are left?
  32. 32.The price of a school bag changes from ₹740 to ₹777. By what percent did it go up?
  33. 33.A water tank holds 4280 litres. 20% of the water is used. How many litres are left?
  34. 34.A price goes up by 25% and then goes up by 30% more. By what percent has it gone up in all? =
  35. 35.The price of a school bag changes from ₹4660 to ₹5825. By what percent did it go up?
  36. 36.The price of a school bag changes from ₹1500 to ₹1200. By what percent did it come down?
  37. 37.A water tank holds 2300 litres. 20% of the water is used. How many litres are left?
  38. 38.A town has 3020 people. Its population grows by 50%. How many people live there now?
  39. 39.A price comes down by 15% and then comes down by 5% more. By what percent has it come down in all? =
  40. 40.The price of a school bag changes from ₹860 to ₹602. By what percent did it come down?

Answer key

  1. 1751
  2. 26.5
  3. 28
  4. 44
  5. 5
  6. 468
  7. 50
  8. 40
  9. 2385
  10. 61
  11. 125
  12. 43
  13. 32
  14. 27.5
  15. 2352
  16. 4097
  17. 20.75
  18. 2682
  19. 5544
  20. 5
  21. 2400
  22. 30
  23. 4796
  24. 40
  25. 1778
  26. 5589
  27. 1364
  28. 2478
  29. 76
  30. 50
  31. 2448
  32. 5
  33. 3424
  34. 62.5
  35. 25
  36. 20
  37. 1840
  38. 4530
  39. 19.25
  40. 30

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