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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 282 · 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 price goes up by 50% and then comes down by 20%. By what percent has it gone up in all? =
  2. 2.The price of a school bag changes from ₹2180 to ₹2398. By what percent did it go up?
  3. 3.A water tank holds 2680 litres. 50% of the water is used. How many litres are left?
  4. 4.A town has 760 people. Its population grows by 40%. How many people live there now?
  5. 5.A price goes up by 5% and then goes up by 10% more. By what percent has it gone up in all? =
  6. 6.The price of a school bag changes from ₹3260 to ₹4564. By what percent did it go up?
  7. 7.A price goes up by 40% and then goes up by 15% more. By what percent has it gone up in all? =
  8. 8.A price goes up by 15% and then goes up by 25% more. By what percent has it gone up in all? =
  9. 9.A water tank holds 660 litres. 5% of the water is used. How many litres are left?
  10. 10.A shop sells 4220 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  11. 11.The price of a school bag changes from ₹4080 to ₹5712. By what percent did it go up?
  12. 12.A shop sells 4440 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  13. 13.The price of a bicycle is ₹3940. It goes up by 30%. What is the new price (in ₹)?
  14. 14.The price of a bicycle is ₹4300. It goes up by 40%. What is the new price (in ₹)?
  15. 15.A water tank holds 2960 litres. 50% of the water is used. How many litres are left?
  16. 16.The price of a school bag changes from ₹2700 to ₹3240. By what percent did it go up?
  17. 17.A water tank holds 2040 litres. 20% of the water is used. How many litres are left?
  18. 18.A town has 4520 people. Its population grows by 15%. How many people live there now?
  19. 19.The price of a school bag changes from ₹4000 to ₹4200. By what percent did it go up?
  20. 20.A town has 460 people. Its population grows by 20%. How many people live there now?
  21. 21.A price goes up by 50% and then goes up by 15% more. By what percent has it gone up in all? =
  22. 22.A price goes up by 10% and then goes up by 5% more. By what percent has it gone up in all? =
  23. 23.A water tank holds 3740 litres. 20% of the water is used. How many litres are left?
  24. 24.A price comes down by 10% and then comes down by 40% more. By what percent has it come down in all? =
  25. 25.A water tank holds 3840 litres. 40% of the water is used. How many litres are left?
  26. 26.A town has 300 people. Its population grows by 20%. How many people live there now?
  27. 27.The price of a school bag changes from ₹2100 to ₹2730. By what percent did it go up?
  28. 28.A water tank holds 300 litres. 40% of the water is used. How many litres are left?
  29. 29.A shop sells 1240 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  30. 30.A water tank holds 4240 litres. 30% of the water is used. How many litres are left?
  31. 31.The price of a school bag changes from ₹920 to ₹1058. By what percent did it go up?
  32. 32.The price of a school bag changes from ₹1820 to ₹1729. By what percent did it come down?
  33. 33.A town has 1080 people. Its population grows by 20%. How many people live there now?
  34. 34.The price of a school bag changes from ₹4320 to ₹2160. By what percent did it come down?
  35. 35.The price of a school bag changes from ₹2240 to ₹1568. By what percent did it come down?
  36. 36.The price of a school bag changes from ₹4780 to ₹5736. By what percent did it go up?
  37. 37.A water tank holds 3100 litres. 20% of the water is used. How many litres are left?
  38. 38.A town has 4120 people. Its population grows by 5%. How many people live there now?
  39. 39.A price comes down by 25% and then comes down by 15% more. By what percent has it come down in all? =
  40. 40.A water tank holds 520 litres. 25% of the water is used. How many litres are left?

Answer key

  1. 20
  2. 10
  3. 1340
  4. 1064
  5. 15.5
  6. 40
  7. 61
  8. 43.75
  9. 627
  10. 4642
  11. 40
  12. 5328
  13. 5122
  14. 6020
  15. 1480
  16. 20
  17. 1632
  18. 5198
  19. 5
  20. 552
  21. 72.5
  22. 15.5
  23. 2992
  24. 46
  25. 2304
  26. 360
  27. 30
  28. 180
  29. 1736
  30. 2968
  31. 15
  32. 5
  33. 1296
  34. 50
  35. 30
  36. 20
  37. 2480
  38. 4326
  39. 36.25
  40. 390

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