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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 13 · 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 town has 3840 people. Its population grows by 25%. How many people live there now?
  2. 2.The price of a school bag changes from ₹1380 to ₹1518. By what percent did it go up?
  3. 3.A price comes down by 5% and then comes down by 20% more. By what percent has it come down in all? =
  4. 4.A water tank holds 1260 litres. 20% of the water is used. How many litres are left?
  5. 5.A price comes down by 25% and then comes down by 25% more. By what percent has it come down in all? =
  6. 6.A price comes down by 30% and then comes down by 25% more. By what percent has it come down in all? =
  7. 7.A price goes up by 30% and then goes up by 10% more. By what percent has it gone up in all? =
  8. 8.A price comes down by 30% and then comes down by 50% more. By what percent has it come down in all? =
  9. 9.A shop sells 3240 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  10. 10.A price goes up by 40% and then comes down by 5%. By what percent has it gone up in all? =
  11. 11.A water tank holds 4180 litres. 10% of the water is used. How many litres are left?
  12. 12.A water tank holds 4480 litres. 40% of the water is used. How many litres are left?
  13. 13.The price of a school bag changes from ₹2060 to ₹1648. By what percent did it come down?
  14. 14.A town has 1540 people. Its population grows by 10%. How many people live there now?
  15. 15.A town has 2660 people. Its population grows by 15%. How many people live there now?
  16. 16.The price of a school bag changes from ₹600 to ₹720. By what percent did it go up?
  17. 17.A price goes up by 30% and then goes up by 40% more. By what percent has it gone up in all? =
  18. 18.The price of a school bag changes from ₹2160 to ₹1296. By what percent did it come down?
  19. 19.The price of a bicycle is ₹4540. It goes up by 40%. What is the new price (in ₹)?
  20. 20.The price of a bicycle is ₹1400. It goes up by 40%. What is the new price (in ₹)?
  21. 21.The price of a bicycle is ₹1100. It goes up by 30%. What is the new price (in ₹)?
  22. 22.The price of a school bag changes from ₹2080 to ₹2392. By what percent did it go up?
  23. 23.A town has 4540 people. Its population grows by 20%. How many people live there now?
  24. 24.The price of a school bag changes from ₹2080 to ₹1768. By what percent did it come down?
  25. 25.A water tank holds 920 litres. 10% of the water is used. How many litres are left?
  26. 26.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =
  27. 27.The price of a school bag changes from ₹1160 to ₹812. By what percent did it come down?
  28. 28.A water tank holds 4660 litres. 5% of the water is used. How many litres are left?
  29. 29.A water tank holds 220 litres. 40% of the water is used. How many litres are left?
  30. 30.A price goes up by 10% and then goes up by 15% more. By what percent has it gone up in all? =
  31. 31.A price goes up by 15% and then goes up by 10% more. By what percent has it gone up in all? =
  32. 32.The price of a school bag changes from ₹2200 to ₹1650. By what percent did it come down?
  33. 33.A price goes up by 20% and then goes up by 20% more. By what percent has it gone up in all? =
  34. 34.The price of a bicycle is ₹1040. It goes up by 30%. What is the new price (in ₹)?
  35. 35.A price goes up by 25% and then goes up by 10% more. By what percent has it gone up in all? =
  36. 36.A water tank holds 2880 litres. 30% of the water is used. How many litres are left?
  37. 37.The price of a school bag changes from ₹4160 to ₹3952. By what percent did it come down?
  38. 38.The price of a school bag changes from ₹1480 to ₹1184. By what percent did it come down?
  39. 39.A shop sells 2740 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  40. 40.The price of a school bag changes from ₹3960 to ₹5544. By what percent did it go up?

Answer key

  1. 4800
  2. 10
  3. 24
  4. 1008
  5. 43.75
  6. 47.5
  7. 43
  8. 65
  9. 4536
  10. 33
  11. 3762
  12. 2688
  13. 20
  14. 1694
  15. 3059
  16. 20
  17. 82
  18. 40
  19. 6356
  20. 1960
  21. 1430
  22. 15
  23. 5448
  24. 15
  25. 828
  26. 21
  27. 30
  28. 4427
  29. 132
  30. 26.5
  31. 26.5
  32. 25
  33. 44
  34. 1352
  35. 37.5
  36. 2016
  37. 5
  38. 20
  39. 3151
  40. 40

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