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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 552 · 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 ₹260 to ₹312. By what percent did it go up?
  2. 2.A water tank holds 1220 litres. 20% of the water is used. How many litres are left?
  3. 3.A water tank holds 1540 litres. 50% of the water is used. How many litres are left?
  4. 4.A water tank holds 60 litres. 10% of the water is used. How many litres are left?
  5. 5.A water tank holds 520 litres. 50% of the water is used. How many litres are left?
  6. 6.The price of a school bag changes from ₹3340 to ₹2004. By what percent did it come down?
  7. 7.A price goes up by 5% and then goes up by 50% more. By what percent has it gone up in all? =
  8. 8.A shop sells 3780 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  9. 9.A shop sells 3460 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  10. 10.The price of a bicycle is ₹840. It goes up by 30%. What is the new price (in ₹)?
  11. 11.A shop sells 2000 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  12. 12.A price goes up by 30% and then comes down by 10%. By what percent has it gone up in all? =
  13. 13.A town has 1000 people. Its population grows by 40%. How many people live there now?
  14. 14.The price of a bicycle is ₹1640. It goes up by 5%. What is the new price (in ₹)?
  15. 15.A price comes down by 5% and then comes down by 25% more. By what percent has it come down in all? =
  16. 16.The price of a bicycle is ₹4820. It goes up by 15%. What is the new price (in ₹)?
  17. 17.The price of a school bag changes from ₹5000 to ₹5500. By what percent did it go up?
  18. 18.A water tank holds 1280 litres. 5% of the water is used. How many litres are left?
  19. 19.A water tank holds 1500 litres. 40% of the water is used. How many litres are left?
  20. 20.The price of a school bag changes from ₹1660 to ₹2490. By what percent did it go up?
  21. 21.A price comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =
  22. 22.The price of a bicycle is ₹4480. It goes up by 10%. What is the new price (in ₹)?
  23. 23.A price comes down by 5% and then comes down by 15% more. By what percent has it come down in all? =
  24. 24.A water tank holds 1160 litres. 5% of the water is used. How many litres are left?
  25. 25.The price of a school bag changes from ₹820 to ₹984. By what percent did it go up?
  26. 26.The price of a school bag changes from ₹1300 to ₹1430. By what percent did it go up?
  27. 27.A water tank holds 1600 litres. 40% of the water is used. How many litres are left?
  28. 28.A water tank holds 420 litres. 5% of the water is used. How many litres are left?
  29. 29.A town has 1280 people. Its population grows by 25%. How many people live there now?
  30. 30.A price comes down by 30% and then comes down by 30% more. By what percent has it come down in all? =
  31. 31.A water tank holds 1080 litres. 30% of the water is used. How many litres are left?
  32. 32.A town has 4080 people. Its population grows by 50%. How many people live there now?
  33. 33.A price comes down by 40% and then comes down by 10% more. By what percent has it come down in all? =
  34. 34.A town has 4520 people. Its population grows by 50%. How many people live there now?
  35. 35.A water tank holds 400 litres. 20% of the water is used. How many litres are left?
  36. 36.The price of a bicycle is ₹4900. It goes up by 50%. What is the new price (in ₹)?
  37. 37.The price of a school bag changes from ₹1580 to ₹2212. By what percent did it go up?
  38. 38.A water tank holds 100 litres. 40% of the water is used. How many litres are left?
  39. 39.The price of a school bag changes from ₹3980 to ₹3383. By what percent did it come down?
  40. 40.The price of a school bag changes from ₹3880 to ₹2910. By what percent did it come down?

Answer key

  1. 20
  2. 976
  3. 770
  4. 54
  5. 260
  6. 40
  7. 57.5
  8. 5292
  9. 4498
  10. 1092
  11. 2800
  12. 17
  13. 1400
  14. 1722
  15. 28.75
  16. 5543
  17. 10
  18. 1216
  19. 900
  20. 50
  21. 9.75
  22. 4928
  23. 19.25
  24. 1102
  25. 20
  26. 10
  27. 960
  28. 399
  29. 1600
  30. 51
  31. 756
  32. 6120
  33. 46
  34. 6780
  35. 320
  36. 7350
  37. 40
  38. 60
  39. 15
  40. 25

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