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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 940 · 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 4800 people. Its population grows by 40%. How many people live there now?
  2. 2.A water tank holds 4760 litres. 40% of the water is used. How many litres are left?
  3. 3.The price of a school bag changes from ₹2680 to ₹2546. By what percent did it come down?
  4. 4.The price of a bicycle is ₹3480. It goes up by 10%. What is the new price (in ₹)?
  5. 5.A water tank holds 880 litres. 10% of the water is used. How many litres are left?
  6. 6.A price comes down by 50% and then comes down by 40% more. By what percent has it come down in all? =
  7. 7.A water tank holds 3760 litres. 40% of the water is used. How many litres are left?
  8. 8.A price goes up by 10% and then goes up by 15% more. By what percent has it gone up in all? =
  9. 9.The price of a school bag changes from ₹2320 to ₹3480. By what percent did it go up?
  10. 10.The price of a school bag changes from ₹1900 to ₹1520. By what percent did it come down?
  11. 11.A town has 3200 people. Its population grows by 40%. How many people live there now?
  12. 12.The price of a school bag changes from ₹460 to ₹483. By what percent did it go up?
  13. 13.A water tank holds 700 litres. 30% of the water is used. How many litres are left?
  14. 14.A water tank holds 3020 litres. 40% of the water is used. How many litres are left?
  15. 15.A water tank holds 740 litres. 15% of the water is used. How many litres are left?
  16. 16.The price of a bicycle is ₹460. It goes up by 30%. What is the new price (in ₹)?
  17. 17.The price of a bicycle is ₹1300. It goes up by 50%. What is the new price (in ₹)?
  18. 18.The price of a bicycle is ₹60. It goes up by 5%. What is the new price (in ₹)?
  19. 19.A price comes down by 20% and then comes down by 40% more. By what percent has it come down in all? =
  20. 20.The price of a school bag changes from ₹1740 to ₹2262. By what percent did it go up?
  21. 21.The price of a school bag changes from ₹2280 to ₹1368. By what percent did it come down?
  22. 22.A shop sells 1640 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  23. 23.A town has 1380 people. Its population grows by 30%. How many people live there now?
  24. 24.The price of a school bag changes from ₹2520 to ₹2646. By what percent did it go up?
  25. 25.A price goes up by 30% and then goes up by 40% more. By what percent has it gone up in all? =
  26. 26.A water tank holds 4860 litres. 30% of the water is used. How many litres are left?
  27. 27.A water tank holds 1880 litres. 10% of the water is used. How many litres are left?
  28. 28.A water tank holds 1100 litres. 5% of the water is used. How many litres are left?
  29. 29.A price comes down by 10% and then comes down by 30% more. By what percent has it come down in all? =
  30. 30.The price of a school bag changes from ₹3500 to ₹4550. By what percent did it go up?
  31. 31.A shop sells 3820 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  32. 32.A water tank holds 4660 litres. 5% of the water is used. How many litres are left?
  33. 33.The price of a school bag changes from ₹4800 to ₹7200. By what percent did it go up?
  34. 34.A price goes up by 20% and then comes down by 15%. By what percent has it gone up in all? =
  35. 35.The price of a school bag changes from ₹1440 to ₹1152. By what percent did it come down?
  36. 36.A price comes down by 20% and then comes down by 30% more. By what percent has it come down in all? =
  37. 37.A price goes up by 25% and then comes down by 10%. By what percent has it gone up in all? =
  38. 38.A water tank holds 80 litres. 5% of the water is used. How many litres are left?
  39. 39.A price comes down by 40% and then comes down by 5% more. By what percent has it come down in all? =
  40. 40.A water tank holds 4860 litres. 15% of the water is used. How many litres are left?

Answer key

  1. 6720
  2. 2856
  3. 5
  4. 3828
  5. 792
  6. 70
  7. 2256
  8. 26.5
  9. 50
  10. 20
  11. 4480
  12. 5
  13. 490
  14. 1812
  15. 629
  16. 598
  17. 1950
  18. 63
  19. 52
  20. 30
  21. 40
  22. 2050
  23. 1794
  24. 5
  25. 82
  26. 3402
  27. 1692
  28. 1045
  29. 37
  30. 30
  31. 5348
  32. 4427
  33. 50
  34. 2
  35. 20
  36. 44
  37. 12.5
  38. 76
  39. 43
  40. 4131

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