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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 208 · 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.

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  1. 1.A shop sells 4060 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  2. 2.A shop sells 1720 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  3. 3.A water tank holds 1140 litres. 25% of the water is used. How many litres are left?
  4. 4.A water tank holds 1880 litres. 10% of the water is used. How many litres are left?
  5. 5.The price of a bicycle is ₹4920. It goes up by 50%. What is the new price (in ₹)?
  6. 6.A town has 1520 people. Its population grows by 5%. How many people live there now?
  7. 7.The price of a school bag changes from ₹100 to ₹105. By what percent did it go up?
  8. 8.A price goes up by 15% and then goes up by 20% more. By what percent has it gone up in all? =
  9. 9.A town has 1320 people. Its population grows by 10%. How many people live there now?
  10. 10.A shop sells 480 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  11. 11.The price of a school bag changes from ₹1260 to ₹882. By what percent did it come down?
  12. 12.A water tank holds 4660 litres. 25% of the water is used. How many litres are left?
  13. 13.A water tank holds 3300 litres. 30% of the water is used. How many litres are left?
  14. 14.A shop sells 760 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  15. 15.The price of a school bag changes from ₹2060 to ₹1648. By what percent did it come down?
  16. 16.The price of a bicycle is ₹2320. It goes up by 30%. What is the new price (in ₹)?
  17. 17.The price of a bicycle is ₹740. It goes up by 5%. What is the new price (in ₹)?
  18. 18.A price comes down by 15% and then comes down by 25% more. By what percent has it come down in all? =
  19. 19.The price of a school bag changes from ₹2820 to ₹3666. By what percent did it go up?
  20. 20.A price goes up by 20% and then goes up by 10% more. By what percent has it gone up in all? =
  21. 21.The price of a school bag changes from ₹4000 to ₹5600. By what percent did it go up?
  22. 22.The price of a school bag changes from ₹3700 to ₹3515. By what percent did it come down?
  23. 23.A shop sells 3560 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  24. 24.The price of a school bag changes from ₹2340 to ₹1872. By what percent did it come down?
  25. 25.A town has 3440 people. Its population grows by 25%. How many people live there now?
  26. 26.A water tank holds 1920 litres. 20% of the water is used. How many litres are left?
  27. 27.A price goes up by 40% and then comes down by 10%. By what percent has it gone up in all? =
  28. 28.The price of a bicycle is ₹4480. It goes up by 15%. What is the new price (in ₹)?
  29. 29.A price goes up by 25% and then goes up by 30% more. By what percent has it gone up in all? =
  30. 30.A price comes down by 15% and then comes down by 20% more. By what percent has it come down in all? =
  31. 31.A price comes down by 40% and then comes down by 5% more. By what percent has it come down in all? =
  32. 32.A water tank holds 2340 litres. 40% of the water is used. How many litres are left?
  33. 33.A water tank holds 4540 litres. 50% of the water is used. How many litres are left?
  34. 34.A water tank holds 1960 litres. 30% of the water is used. How many litres are left?
  35. 35.The price of a school bag changes from ₹3540 to ₹3009. By what percent did it come down?
  36. 36.The price of a bicycle is ₹2660. It goes up by 10%. What is the new price (in ₹)?
  37. 37.A price goes up by 25% and then goes up by 10% more. By what percent has it gone up in all? =
  38. 38.A town has 2460 people. Its population grows by 20%. How many people live there now?
  39. 39.A price goes up by 30% and then goes up by 10% more. By what percent has it gone up in all? =
  40. 40.The price of a bicycle is ₹660. It goes up by 40%. What is the new price (in ₹)?

Answer key

  1. 4669
  2. 2236
  3. 855
  4. 1692
  5. 7380
  6. 1596
  7. 5
  8. 38
  9. 1452
  10. 720
  11. 30
  12. 3495
  13. 2310
  14. 836
  15. 20
  16. 3016
  17. 777
  18. 36.25
  19. 30
  20. 32
  21. 40
  22. 5
  23. 5340
  24. 20
  25. 4300
  26. 1536
  27. 26
  28. 5152
  29. 62.5
  30. 32
  31. 43
  32. 1404
  33. 2270
  34. 1372
  35. 15
  36. 2926
  37. 37.5
  38. 2952
  39. 43
  40. 924

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