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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 88 · 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 480 litres. 30% of the water is used. How many litres are left?
  2. 2.A shop sells 2000 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  3. 3.A water tank holds 2400 litres. 5% of the water is used. How many litres are left?
  4. 4.The price of a school bag changes from ₹820 to ₹902. By what percent did it go up?
  5. 5.A price comes down by 25% and then comes down by 40% more. By what percent has it come down in all? =
  6. 6.A price goes up by 40% and then goes up by 10% more. By what percent has it gone up in all? =
  7. 7.The price of a school bag changes from ₹1200 to ₹1020. By what percent did it come down?
  8. 8.A town has 1820 people. Its population grows by 20%. How many people live there now?
  9. 9.A town has 920 people. Its population grows by 10%. How many people live there now?
  10. 10.The price of a bicycle is ₹3100. It goes up by 40%. What is the new price (in ₹)?
  11. 11.A water tank holds 2620 litres. 15% of the water is used. How many litres are left?
  12. 12.The price of a school bag changes from ₹1100 to ₹990. By what percent did it come down?
  13. 13.A water tank holds 3960 litres. 25% of the water is used. How many litres are left?
  14. 14.A water tank holds 3340 litres. 15% of the water is used. How many litres are left?
  15. 15.The price of a school bag changes from ₹100 to ₹140. By what percent did it go up?
  16. 16.A price goes up by 5% and then goes up by 5% more. By what percent has it gone up in all? =
  17. 17.A water tank holds 3280 litres. 50% of the water is used. How many litres are left?
  18. 18.The price of a school bag changes from ₹1340 to ₹1474. By what percent did it go up?
  19. 19.The price of a school bag changes from ₹1900 to ₹2850. By what percent did it go up?
  20. 20.A price goes up by 25% and then goes up by 5% more. By what percent has it gone up in all? =
  21. 21.A shop sells 3520 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  22. 22.A water tank holds 1760 litres. 15% of the water is used. How many litres are left?
  23. 23.A water tank holds 3680 litres. 50% of the water is used. How many litres are left?
  24. 24.The price of a school bag changes from ₹3360 to ₹3024. By what percent did it come down?
  25. 25.A town has 600 people. Its population grows by 25%. How many people live there now?
  26. 26.A price goes up by 10% and then goes up by 30% more. By what percent has it gone up in all? =
  27. 27.A town has 1780 people. Its population grows by 5%. How many people live there now?
  28. 28.A price goes up by 15% and then goes up by 30% more. By what percent has it gone up in all? =
  29. 29.A water tank holds 780 litres. 5% of the water is used. How many litres are left?
  30. 30.The price of a school bag changes from ₹3720 to ₹4092. By what percent did it go up?
  31. 31.The price of a bicycle is ₹1720. It goes up by 40%. What is the new price (in ₹)?
  32. 32.The price of a school bag changes from ₹4120 to ₹2884. By what percent did it come down?
  33. 33.The price of a school bag changes from ₹2880 to ₹2160. By what percent did it come down?
  34. 34.A shop sells 1320 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  35. 35.The price of a bicycle is ₹640. It goes up by 10%. What is the new price (in ₹)?
  36. 36.A price comes down by 15% and then comes down by 15% more. By what percent has it come down in all? =
  37. 37.The price of a bicycle is ₹820. It goes up by 40%. What is the new price (in ₹)?
  38. 38.The price of a bicycle is ₹4720. It goes up by 15%. What is the new price (in ₹)?
  39. 39.A water tank holds 4980 litres. 25% of the water is used. How many litres are left?
  40. 40.The price of a school bag changes from ₹3640 to ₹3822. By what percent did it go up?

Answer key

  1. 336
  2. 2300
  3. 2280
  4. 10
  5. 55
  6. 54
  7. 15
  8. 2184
  9. 1012
  10. 4340
  11. 2227
  12. 10
  13. 2970
  14. 2839
  15. 40
  16. 10.25
  17. 1640
  18. 10
  19. 50
  20. 31.25
  21. 4224
  22. 1496
  23. 1840
  24. 10
  25. 750
  26. 43
  27. 1869
  28. 49.5
  29. 741
  30. 10
  31. 2408
  32. 30
  33. 25
  34. 1452
  35. 704
  36. 27.75
  37. 1148
  38. 5428
  39. 3735
  40. 5

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