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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 311 · 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 4100 litres. 25% of the water is used. How many litres are left?
  2. 2.The price of a school bag changes from ₹440 to ₹462. By what percent did it go up?
  3. 3.The price of a school bag changes from ₹480 to ₹552. By what percent did it go up?
  4. 4.A price goes up by 25% and then comes down by 10%. By what percent has it gone up in all? =
  5. 5.A water tank holds 4660 litres. 25% of the water is used. How many litres are left?
  6. 6.The price of a school bag changes from ₹480 to ₹456. By what percent did it come down?
  7. 7.A shop sells 1300 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  8. 8.A town has 1820 people. Its population grows by 30%. How many people live there now?
  9. 9.A water tank holds 4680 litres. 25% of the water is used. How many litres are left?
  10. 10.The price of a school bag changes from ₹3060 to ₹2601. By what percent did it come down?
  11. 11.A price comes down by 50% and then comes down by 5% more. By what percent has it come down in all? =
  12. 12.The price of a school bag changes from ₹1480 to ₹2220. By what percent did it go up?
  13. 13.The price of a bicycle is ₹4000. It goes up by 15%. What is the new price (in ₹)?
  14. 14.A shop sells 620 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  15. 15.A water tank holds 3780 litres. 25% of the water is used. How many litres are left?
  16. 16.A price comes down by 15% and then comes down by 50% more. By what percent has it come down in all? =
  17. 17.The price of a school bag changes from ₹4920 to ₹2460. By what percent did it come down?
  18. 18.A shop sells 1660 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  19. 19.A town has 3540 people. Its population grows by 10%. How many people live there now?
  20. 20.A shop sells 440 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  21. 21.A price comes down by 50% and then comes down by 40% more. By what percent has it come down in all? =
  22. 22.A water tank holds 1020 litres. 5% of the water is used. How many litres are left?
  23. 23.A price goes up by 10% and then goes up by 50% more. By what percent has it gone up in all? =
  24. 24.A price goes up by 25% and then goes up by 5% more. By what percent has it gone up in all? =
  25. 25.A water tank holds 2160 litres. 20% of the water is used. How many litres are left?
  26. 26.A water tank holds 3980 litres. 5% of the water is used. How many litres are left?
  27. 27.The price of a school bag changes from ₹1000 to ₹1100. By what percent did it go up?
  28. 28.A water tank holds 900 litres. 15% of the water is used. How many litres are left?
  29. 29.The price of a school bag changes from ₹1080 to ₹1350. By what percent did it go up?
  30. 30.A price goes up by 40% and then goes up by 5% more. By what percent has it gone up in all? =
  31. 31.A water tank holds 4040 litres. 50% of the water is used. How many litres are left?
  32. 32.A town has 1020 people. Its population grows by 40%. How many people live there now?
  33. 33.A water tank holds 3500 litres. 20% of the water is used. How many litres are left?
  34. 34.A price comes down by 25% and then comes down by 10% more. By what percent has it come down in all? =
  35. 35.A price goes up by 40% and then goes up by 40% more. By what percent has it gone up in all? =
  36. 36.A price comes down by 50% and then comes down by 10% more. By what percent has it come down in all? =
  37. 37.A water tank holds 1600 litres. 40% of the water is used. How many litres are left?
  38. 38.The price of a school bag changes from ₹2180 to ₹1090. By what percent did it come down?
  39. 39.A town has 1160 people. Its population grows by 40%. How many people live there now?
  40. 40.A shop sells 4380 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?

Answer key

  1. 3075
  2. 5
  3. 15
  4. 12.5
  5. 3495
  6. 5
  7. 1365
  8. 2366
  9. 3510
  10. 15
  11. 52.5
  12. 50
  13. 4600
  14. 868
  15. 2835
  16. 57.5
  17. 50
  18. 1992
  19. 3894
  20. 550
  21. 70
  22. 969
  23. 65
  24. 31.25
  25. 1728
  26. 3781
  27. 10
  28. 765
  29. 25
  30. 47
  31. 2020
  32. 1428
  33. 2800
  34. 32.5
  35. 96
  36. 55
  37. 960
  38. 50
  39. 1624
  40. 6132

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