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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 170 · 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 shop sells 2660 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  2. 2.A shop sells 1740 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  3. 3.A water tank holds 4400 litres. 40% of the water is used. How many litres are left?
  4. 4.The price of a bicycle is ₹4560. It goes up by 25%. What is the new price (in ₹)?
  5. 5.The price of a school bag changes from ₹3340 to ₹2672. By what percent did it come down?
  6. 6.A price goes up by 10% and then goes up by 50% more. By what percent has it gone up in all? =
  7. 7.The price of a school bag changes from ₹2820 to ₹2256. By what percent did it come down?
  8. 8.The price of a bicycle is ₹340. It goes up by 25%. What is the new price (in ₹)?
  9. 9.A price comes down by 10% and then comes down by 15% more. By what percent has it come down in all? =
  10. 10.The price of a school bag changes from ₹1540 to ₹1617. By what percent did it go up?
  11. 11.A price comes down by 40% and then comes down by 15% more. By what percent has it come down in all? =
  12. 12.The price of a school bag changes from ₹2680 to ₹2948. By what percent did it go up?
  13. 13.The price of a school bag changes from ₹1580 to ₹1501. By what percent did it come down?
  14. 14.The price of a bicycle is ₹1940. It goes up by 10%. What is the new price (in ₹)?
  15. 15.The price of a bicycle is ₹4820. It goes up by 15%. What is the new price (in ₹)?
  16. 16.A water tank holds 1980 litres. 20% of the water is used. How many litres are left?
  17. 17.A shop sells 1020 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  18. 18.A price comes down by 25% and then comes down by 10% more. By what percent has it come down in all? =
  19. 19.The price of a bicycle is ₹2300. It goes up by 25%. What is the new price (in ₹)?
  20. 20.A water tank holds 3240 litres. 40% of the water is used. How many litres are left?
  21. 21.The price of a school bag changes from ₹2000 to ₹1700. By what percent did it come down?
  22. 22.A shop sells 600 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  23. 23.A water tank holds 2040 litres. 30% of the water is used. How many litres are left?
  24. 24.A town has 80 people. Its population grows by 20%. How many people live there now?
  25. 25.A price goes up by 50% and then comes down by 25%. By what percent has it gone up in all? =
  26. 26.A water tank holds 4460 litres. 10% of the water is used. How many litres are left?
  27. 27.A water tank holds 4400 litres. 25% of the water is used. How many litres are left?
  28. 28.A water tank holds 3460 litres. 20% of the water is used. How many litres are left?
  29. 29.The price of a school bag changes from ₹680 to ₹646. By what percent did it come down?
  30. 30.A water tank holds 3080 litres. 30% of the water is used. How many litres are left?
  31. 31.The price of a bicycle is ₹100. It goes up by 25%. What is the new price (in ₹)?
  32. 32.A water tank holds 520 litres. 30% of the water is used. How many litres are left?
  33. 33.A price comes down by 10% and then comes down by 25% more. By what percent has it come down in all? =
  34. 34.A water tank holds 3040 litres. 30% of the water is used. How many litres are left?
  35. 35.A water tank holds 1700 litres. 15% of the water is used. How many litres are left?
  36. 36.The price of a bicycle is ₹1200. It goes up by 50%. What is the new price (in ₹)?
  37. 37.A price goes up by 5% and then goes up by 15% more. By what percent has it gone up in all? =
  38. 38.The price of a school bag changes from ₹1660 to ₹1743. By what percent did it go up?
  39. 39.A water tank holds 1980 litres. 25% of the water is used. How many litres are left?
  40. 40.A price goes up by 50% and then goes up by 30% more. By what percent has it gone up in all? =

Answer key

  1. 3325
  2. 1914
  3. 2640
  4. 5700
  5. 20
  6. 65
  7. 20
  8. 425
  9. 23.5
  10. 5
  11. 49
  12. 10
  13. 5
  14. 2134
  15. 5543
  16. 1584
  17. 1173
  18. 32.5
  19. 2875
  20. 1944
  21. 15
  22. 720
  23. 1428
  24. 96
  25. 12.5
  26. 4014
  27. 3300
  28. 2768
  29. 5
  30. 2156
  31. 125
  32. 364
  33. 32.5
  34. 2128
  35. 1445
  36. 1800
  37. 20.75
  38. 5
  39. 1485
  40. 95

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