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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 591 · 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 ₹3320 to ₹3486. By what percent did it go up?
  2. 2.A shop sells 2640 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  3. 3.A price comes down by 40% and then comes down by 15% more. By what percent has it come down in all? =
  4. 4.A water tank holds 2060 litres. 20% of the water is used. How many litres are left?
  5. 5.A price goes up by 10% and then comes down by 5%. By what percent has it gone up in all? =
  6. 6.A price goes up by 5% and then goes up by 10% more. By what percent has it gone up in all? =
  7. 7.A water tank holds 780 litres. 25% of the water is used. How many litres are left?
  8. 8.The price of a school bag changes from ₹4500 to ₹5400. By what percent did it go up?
  9. 9.The price of a bicycle is ₹840. It goes up by 10%. What is the new price (in ₹)?
  10. 10.A water tank holds 2860 litres. 20% of the water is used. How many litres are left?
  11. 11.The price of a bicycle is ₹2980. It goes up by 50%. What is the new price (in ₹)?
  12. 12.A water tank holds 3840 litres. 5% of the water is used. How many litres are left?
  13. 13.A water tank holds 1740 litres. 40% of the water is used. How many litres are left?
  14. 14.A water tank holds 4260 litres. 5% of the water is used. How many litres are left?
  15. 15.A town has 820 people. Its population grows by 15%. How many people live there now?
  16. 16.A price comes down by 40% and then comes down by 5% more. By what percent has it come down in all? =
  17. 17.A price goes up by 20% and then goes up by 10% more. By what percent has it gone up in all? =
  18. 18.The price of a school bag changes from ₹4500 to ₹5625. By what percent did it go up?
  19. 19.A price comes down by 5% and then comes down by 25% more. By what percent has it come down in all? =
  20. 20.A town has 3260 people. Its population grows by 15%. How many people live there now?
  21. 21.A shop sells 300 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  22. 22.A water tank holds 2420 litres. 25% of the water is used. How many litres are left?
  23. 23.A water tank holds 1240 litres. 25% of the water is used. How many litres are left?
  24. 24.A water tank holds 960 litres. 10% of the water is used. How many litres are left?
  25. 25.A shop sells 3840 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  26. 26.The price of a school bag changes from ₹1620 to ₹1539. By what percent did it come down?
  27. 27.A water tank holds 4600 litres. 20% of the water is used. How many litres are left?
  28. 28.The price of a school bag changes from ₹1440 to ₹2016. By what percent did it go up?
  29. 29.The price of a bicycle is ₹4660. It goes up by 15%. What is the new price (in ₹)?
  30. 30.A shop sells 900 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  31. 31.A price comes down by 10% and then comes down by 50% more. By what percent has it come down in all? =
  32. 32.A price goes up by 25% and then goes up by 10% more. By what percent has it gone up in all? =
  33. 33.The price of a school bag changes from ₹4120 to ₹4944. By what percent did it go up?
  34. 34.A price comes down by 30% and then comes down by 20% more. By what percent has it come down in all? =
  35. 35.A water tank holds 1460 litres. 5% of the water is used. How many litres are left?
  36. 36.The price of a bicycle is ₹520. It goes up by 5%. What is the new price (in ₹)?
  37. 37.The price of a school bag changes from ₹560 to ₹840. By what percent did it go up?
  38. 38.A price comes down by 20% and then comes down by 20% more. By what percent has it come down in all? =
  39. 39.The price of a school bag changes from ₹2080 to ₹1248. By what percent did it come down?
  40. 40.A water tank holds 3580 litres. 30% of the water is used. How many litres are left?

Answer key

  1. 5
  2. 3960
  3. 49
  4. 1648
  5. 4.5
  6. 15.5
  7. 585
  8. 20
  9. 924
  10. 2288
  11. 4470
  12. 3648
  13. 1044
  14. 4047
  15. 943
  16. 43
  17. 32
  18. 25
  19. 28.75
  20. 3749
  21. 330
  22. 1815
  23. 930
  24. 864
  25. 4992
  26. 5
  27. 3680
  28. 40
  29. 5359
  30. 1080
  31. 55
  32. 37.5
  33. 20
  34. 44
  35. 1387
  36. 546
  37. 50
  38. 36
  39. 40
  40. 2506

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