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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 326 · 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 2580 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  2. 2.A shop sells 3180 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  3. 3.A town has 4260 people. Its population grows by 5%. How many people live there now?
  4. 4.The price of a school bag changes from ₹460 to ₹322. By what percent did it come down?
  5. 5.A price comes down by 25% and then comes down by 15% more. By what percent has it come down in all? =
  6. 6.A price goes up by 20% and then goes up by 40% more. By what percent has it gone up in all? =
  7. 7.The price of a school bag changes from ₹3540 to ₹4602. By what percent did it go up?
  8. 8.The price of a bicycle is ₹3180. It goes up by 10%. What is the new price (in ₹)?
  9. 9.A water tank holds 1240 litres. 50% of the water is used. How many litres are left?
  10. 10.The price of a school bag changes from ₹1460 to ₹2190. By what percent did it go up?
  11. 11.The price of a school bag changes from ₹1040 to ₹1248. By what percent did it go up?
  12. 12.A water tank holds 4740 litres. 50% of the water is used. How many litres are left?
  13. 13.A price goes up by 40% and then comes down by 20%. By what percent has it gone up in all? =
  14. 14.The price of a bicycle is ₹2560. It goes up by 25%. What is the new price (in ₹)?
  15. 15.A water tank holds 2020 litres. 5% of the water is used. How many litres are left?
  16. 16.A town has 2720 people. Its population grows by 10%. How many people live there now?
  17. 17.The price of a school bag changes from ₹160 to ₹152. By what percent did it come down?
  18. 18.A price goes up by 30% and then goes up by 50% more. By what percent has it gone up in all? =
  19. 19.The price of a bicycle is ₹840. It goes up by 40%. What is the new price (in ₹)?
  20. 20.The price of a bicycle is ₹560. It goes up by 50%. What is the new price (in ₹)?
  21. 21.A water tank holds 1720 litres. 40% of the water is used. How many litres are left?
  22. 22.A price comes down by 10% and then comes down by 20% more. By what percent has it come down in all? =
  23. 23.A price goes up by 40% and then comes down by 15%. By what percent has it gone up in all? =
  24. 24.A price goes up by 10% and then goes up by 30% more. By what percent has it gone up in all? =
  25. 25.A shop sells 2200 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  26. 26.The price of a school bag changes from ₹1100 to ₹1045. By what percent did it come down?
  27. 27.A town has 320 people. Its population grows by 30%. How many people live there now?
  28. 28.The price of a school bag changes from ₹1780 to ₹1869. By what percent did it go up?
  29. 29.A shop sells 120 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  30. 30.A water tank holds 2100 litres. 15% of the water is used. How many litres are left?
  31. 31.The price of a school bag changes from ₹1440 to ₹1584. By what percent did it go up?
  32. 32.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =
  33. 33.A town has 2180 people. Its population grows by 30%. How many people live there now?
  34. 34.The price of a school bag changes from ₹320 to ₹384. By what percent did it go up?
  35. 35.A shop sells 1380 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  36. 36.The price of a school bag changes from ₹2160 to ₹3024. By what percent did it go up?
  37. 37.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =
  38. 38.A water tank holds 3420 litres. 5% of the water is used. How many litres are left?
  39. 39.A water tank holds 2020 litres. 25% of the water is used. How many litres are left?
  40. 40.A price goes up by 5% and then goes up by 25% more. By what percent has it gone up in all? =

Answer key

  1. 3354
  2. 3657
  3. 4473
  4. 30
  5. 36.25
  6. 68
  7. 30
  8. 3498
  9. 620
  10. 50
  11. 20
  12. 2370
  13. 12
  14. 3200
  15. 1919
  16. 2992
  17. 5
  18. 95
  19. 1176
  20. 840
  21. 1032
  22. 28
  23. 19
  24. 43
  25. 3300
  26. 5
  27. 416
  28. 5
  29. 156
  30. 1785
  31. 10
  32. 21
  33. 2834
  34. 20
  35. 1449
  36. 40
  37. 37.5
  38. 3249
  39. 1515
  40. 31.25

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