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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 102 · 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.The price of a school bag changes from ₹1420 to ₹1562. By what percent did it go up?
  2. 2.A shop sells 3060 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  3. 3.The price of a bicycle is ₹900. It goes up by 30%. What is the new price (in ₹)?
  4. 4.The price of a school bag changes from ₹700 to ₹770. By what percent did it go up?
  5. 5.A shop sells 4340 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  6. 6.A water tank holds 420 litres. 50% of the water is used. How many litres are left?
  7. 7.A town has 320 people. Its population grows by 5%. How many people live there now?
  8. 8.A water tank holds 1740 litres. 5% of the water is used. How many litres are left?
  9. 9.A water tank holds 4780 litres. 40% of the water is used. How many litres are left?
  10. 10.A price comes down by 30% and then comes down by 10% more. By what percent has it come down in all? =
  11. 11.The price of a bicycle is ₹240. It goes up by 15%. What is the new price (in ₹)?
  12. 12.A shop sells 1100 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  13. 13.A town has 200 people. Its population grows by 5%. How many people live there now?
  14. 14.A price goes up by 5% and then goes up by 20% more. By what percent has it gone up in all? =
  15. 15.A shop sells 1220 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  16. 16.A water tank holds 2960 litres. 10% of the water is used. How many litres are left?
  17. 17.The price of a bicycle is ₹3600. It goes up by 15%. What is the new price (in ₹)?
  18. 18.The price of a school bag changes from ₹260 to ₹182. By what percent did it come down?
  19. 19.A price comes down by 40% and then comes down by 5% more. By what percent has it come down in all? =
  20. 20.A water tank holds 840 litres. 30% of the water is used. How many litres are left?
  21. 21.The price of a school bag changes from ₹360 to ₹324. By what percent did it come down?
  22. 22.A water tank holds 1280 litres. 40% of the water is used. How many litres are left?
  23. 23.A water tank holds 4100 litres. 10% of the water is used. How many litres are left?
  24. 24.The price of a school bag changes from ₹3600 to ₹2520. By what percent did it come down?
  25. 25.A price goes up by 20% and then goes up by 15% more. By what percent has it gone up in all? =
  26. 26.The price of a school bag changes from ₹4460 to ₹3122. By what percent did it come down?
  27. 27.A town has 2680 people. Its population grows by 25%. How many people live there now?
  28. 28.A water tank holds 3900 litres. 30% of the water is used. How many litres are left?
  29. 29.The price of a school bag changes from ₹2540 to ₹3556. By what percent did it go up?
  30. 30.A price goes up by 15% and then comes down by 5%. By what percent has it gone up in all? =
  31. 31.A price comes down by 30% and then comes down by 50% more. By what percent has it come down in all? =
  32. 32.The price of a bicycle is ₹2020. It goes up by 50%. What is the new price (in ₹)?
  33. 33.A price goes up by 10% and then goes up by 40% more. By what percent has it gone up in all? =
  34. 34.A shop sells 4580 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  35. 35.A price goes up by 30% and then comes down by 10%. By what percent has it gone up in all? =
  36. 36.The price of a school bag changes from ₹3540 to ₹3894. By what percent did it go up?
  37. 37.The price of a bicycle is ₹1620. It goes up by 10%. What is the new price (in ₹)?
  38. 38.A town has 2300 people. Its population grows by 40%. How many people live there now?
  39. 39.A price comes down by 40% and then comes down by 15% more. By what percent has it come down in all? =
  40. 40.A water tank holds 4940 litres. 20% of the water is used. How many litres are left?

Answer key

  1. 10
  2. 3825
  3. 1170
  4. 10
  5. 4557
  6. 210
  7. 336
  8. 1653
  9. 2868
  10. 37
  11. 276
  12. 1210
  13. 210
  14. 26
  15. 1525
  16. 2664
  17. 4140
  18. 30
  19. 43
  20. 588
  21. 10
  22. 768
  23. 3690
  24. 30
  25. 38
  26. 30
  27. 3350
  28. 2730
  29. 40
  30. 9.25
  31. 65
  32. 3030
  33. 54
  34. 5038
  35. 17
  36. 10
  37. 1782
  38. 3220
  39. 49
  40. 3952

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