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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 768 · 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 town has 2340 people. Its population grows by 5%. How many people live there now?
  2. 2.A price goes up by 25% and then goes up by 5% more. By what percent has it gone up in all? =
  3. 3.A price comes down by 40% and then comes down by 25% more. By what percent has it come down in all? =
  4. 4.A water tank holds 1860 litres. 25% of the water is used. How many litres are left?
  5. 5.A town has 3360 people. Its population grows by 30%. How many people live there now?
  6. 6.The price of a school bag changes from ₹920 to ₹966. By what percent did it go up?
  7. 7.The price of a bicycle is ₹1880. It goes up by 5%. What is the new price (in ₹)?
  8. 8.A water tank holds 2860 litres. 40% of the water is used. How many litres are left?
  9. 9.The price of a school bag changes from ₹620 to ₹682. By what percent did it go up?
  10. 10.The price of a school bag changes from ₹2540 to ₹3048. By what percent did it go up?
  11. 11.A water tank holds 3480 litres. 20% of the water is used. How many litres are left?
  12. 12.A price goes up by 20% and then goes up by 30% more. By what percent has it gone up in all? =
  13. 13.The price of a school bag changes from ₹3060 to ₹3366. By what percent did it go up?
  14. 14.A price goes up by 50% and then goes up by 20% more. By what percent has it gone up in all? =
  15. 15.A water tank holds 2980 litres. 5% of the water is used. How many litres are left?
  16. 16.A town has 3320 people. Its population grows by 15%. How many people live there now?
  17. 17.A water tank holds 4580 litres. 15% of the water is used. How many litres are left?
  18. 18.A water tank holds 3620 litres. 30% of the water is used. How many litres are left?
  19. 19.The price of a school bag changes from ₹2140 to ₹1712. By what percent did it come down?
  20. 20.A water tank holds 280 litres. 30% of the water is used. How many litres are left?
  21. 21.A water tank holds 920 litres. 25% of the water is used. How many litres are left?
  22. 22.A price goes up by 30% and then goes up by 5% more. By what percent has it gone up in all? =
  23. 23.A price goes up by 40% and then goes up by 15% more. By what percent has it gone up in all? =
  24. 24.A shop sells 2480 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  25. 25.A price comes down by 50% and then comes down by 15% more. By what percent has it come down in all? =
  26. 26.A water tank holds 840 litres. 30% of the water is used. How many litres are left?
  27. 27.A shop sells 2520 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  28. 28.A price goes up by 20% and then goes up by 40% more. By what percent has it gone up in all? =
  29. 29.The price of a bicycle is ₹3560. It goes up by 50%. What is the new price (in ₹)?
  30. 30.A town has 780 people. Its population grows by 30%. How many people live there now?
  31. 31.The price of a school bag changes from ₹460 to ₹437. By what percent did it come down?
  32. 32.The price of a school bag changes from ₹1120 to ₹1008. By what percent did it come down?
  33. 33.The price of a bicycle is ₹4900. It goes up by 20%. What is the new price (in ₹)?
  34. 34.A water tank holds 4900 litres. 15% of the water is used. How many litres are left?
  35. 35.The price of a bicycle is ₹500. It goes up by 15%. What is the new price (in ₹)?
  36. 36.A price goes up by 25% and then goes up by 10% more. By what percent has it gone up in all? =
  37. 37.The price of a school bag changes from ₹1260 to ₹1323. By what percent did it go up?
  38. 38.A price comes down by 50% and then comes down by 20% more. By what percent has it come down in all? =
  39. 39.A price comes down by 15% and then comes down by 40% more. By what percent has it come down in all? =
  40. 40.A price goes up by 25% and then comes down by 10%. By what percent has it gone up in all? =

Answer key

  1. 2457
  2. 31.25
  3. 55
  4. 1395
  5. 4368
  6. 5
  7. 1974
  8. 1716
  9. 10
  10. 20
  11. 2784
  12. 56
  13. 10
  14. 80
  15. 2831
  16. 3818
  17. 3893
  18. 2534
  19. 20
  20. 196
  21. 690
  22. 36.5
  23. 61
  24. 3100
  25. 57.5
  26. 588
  27. 2898
  28. 68
  29. 5340
  30. 1014
  31. 5
  32. 10
  33. 5880
  34. 4165
  35. 575
  36. 37.5
  37. 5
  38. 60
  39. 49
  40. 12.5

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