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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 490 · 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 3040 people. Its population grows by 30%. How many people live there now?
  2. 2.A water tank holds 60 litres. 5% of the water is used. How many litres are left?
  3. 3.A water tank holds 2280 litres. 5% of the water is used. How many litres are left?
  4. 4.A water tank holds 1540 litres. 50% of the water is used. How many litres are left?
  5. 5.A town has 460 people. Its population grows by 25%. How many people live there now?
  6. 6.The price of a bicycle is ₹1520. It goes up by 30%. What is the new price (in ₹)?
  7. 7.The price of a school bag changes from ₹4500 to ₹3825. By what percent did it come down?
  8. 8.The price of a bicycle is ₹1820. It goes up by 15%. What is the new price (in ₹)?
  9. 9.The price of a bicycle is ₹2760. It goes up by 40%. What is the new price (in ₹)?
  10. 10.A shop sells 4360 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  11. 11.A water tank holds 2800 litres. 15% of the water is used. How many litres are left?
  12. 12.A town has 2360 people. Its population grows by 40%. How many people live there now?
  13. 13.A shop sells 2400 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  14. 14.The price of a school bag changes from ₹2860 to ₹1716. By what percent did it come down?
  15. 15.A water tank holds 180 litres. 50% of the water is used. How many litres are left?
  16. 16.The price of a bicycle is ₹1640. It goes up by 25%. What is the new price (in ₹)?
  17. 17.The price of a school bag changes from ₹640 to ₹896. By what percent did it go up?
  18. 18.The price of a bicycle is ₹1200. It goes up by 10%. What is the new price (in ₹)?
  19. 19.A town has 2780 people. Its population grows by 15%. How many people live there now?
  20. 20.A town has 4900 people. Its population grows by 50%. How many people live there now?
  21. 21.A shop sells 4660 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  22. 22.A shop sells 2520 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  23. 23.A shop sells 3300 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  24. 24.The price of a school bag changes from ₹1000 to ₹750. By what percent did it come down?
  25. 25.The price of a school bag changes from ₹840 to ₹1176. By what percent did it go up?
  26. 26.The price of a school bag changes from ₹3880 to ₹1940. By what percent did it come down?
  27. 27.A water tank holds 4160 litres. 5% of the water is used. How many litres are left?
  28. 28.A water tank holds 4640 litres. 20% of the water is used. How many litres are left?
  29. 29.The price of a bicycle is ₹4060. It goes up by 50%. What is the new price (in ₹)?
  30. 30.A town has 3340 people. Its population grows by 5%. How many people live there now?
  31. 31.A shop sells 4200 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  32. 32.A price goes up by 50% and then goes up by 20% more. By what percent has it gone up in all? =
  33. 33.A water tank holds 4500 litres. 15% of the water is used. How many litres are left?
  34. 34.A price goes up by 10% and then comes down by 5%. By what percent has it gone up in all? =
  35. 35.The price of a school bag changes from ₹2900 to ₹2030. By what percent did it come down?
  36. 36.A water tank holds 3180 litres. 10% of the water is used. How many litres are left?
  37. 37.A price goes up by 15% and then goes up by 25% more. By what percent has it gone up in all? =
  38. 38.A price comes down by 25% and then comes down by 50% more. By what percent has it come down in all? =
  39. 39.A price goes up by 15% and then goes up by 5% more. By what percent has it gone up in all? =
  40. 40.The price of a school bag changes from ₹2460 to ₹2214. By what percent did it come down?

Answer key

  1. 3952
  2. 57
  3. 2166
  4. 770
  5. 575
  6. 1976
  7. 15
  8. 2093
  9. 3864
  10. 5232
  11. 2380
  12. 3304
  13. 3120
  14. 40
  15. 90
  16. 2050
  17. 40
  18. 1320
  19. 3197
  20. 7350
  21. 4893
  22. 3024
  23. 4125
  24. 25
  25. 40
  26. 50
  27. 3952
  28. 3712
  29. 6090
  30. 3507
  31. 5460
  32. 80
  33. 3825
  34. 4.5
  35. 30
  36. 2862
  37. 43.75
  38. 62.5
  39. 20.75
  40. 10

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