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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 406 · 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 ₹3660 to ₹4575. By what percent did it go up?
  2. 2.A price comes down by 5% and then comes down by 50% more. By what percent has it come down in all? =
  3. 3.The price of a school bag changes from ₹4060 to ₹4872. By what percent did it go up?
  4. 4.A water tank holds 3720 litres. 15% of the water is used. How many litres are left?
  5. 5.The price of a bicycle is ₹1440. It goes up by 10%. What is the new price (in ₹)?
  6. 6.A water tank holds 2320 litres. 10% of the water is used. How many litres are left?
  7. 7.A town has 4400 people. Its population grows by 40%. How many people live there now?
  8. 8.A town has 80 people. Its population grows by 50%. How many people live there now?
  9. 9.The price of a school bag changes from ₹1340 to ₹1675. By what percent did it go up?
  10. 10.The price of a bicycle is ₹1680. It goes up by 25%. What is the new price (in ₹)?
  11. 11.The price of a school bag changes from ₹940 to ₹1081. By what percent did it go up?
  12. 12.A water tank holds 4140 litres. 10% of the water is used. How many litres are left?
  13. 13.The price of a school bag changes from ₹780 to ₹468. By what percent did it come down?
  14. 14.The price of a school bag changes from ₹3240 to ₹2268. By what percent did it come down?
  15. 15.A water tank holds 1500 litres. 5% of the water is used. How many litres are left?
  16. 16.The price of a school bag changes from ₹1020 to ₹1326. By what percent did it go up?
  17. 17.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =
  18. 18.The price of a bicycle is ₹4900. It goes up by 20%. What is the new price (in ₹)?
  19. 19.The price of a school bag changes from ₹2360 to ₹1416. By what percent did it come down?
  20. 20.A town has 720 people. Its population grows by 5%. How many people live there now?
  21. 21.The price of a school bag changes from ₹1440 to ₹1080. By what percent did it come down?
  22. 22.A water tank holds 2220 litres. 10% of the water is used. How many litres are left?
  23. 23.A shop sells 3000 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  24. 24.A water tank holds 2340 litres. 30% of the water is used. How many litres are left?
  25. 25.A shop sells 120 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  26. 26.A town has 1020 people. Its population grows by 40%. How many people live there now?
  27. 27.A price comes down by 15% and then comes down by 20% more. By what percent has it come down in all? =
  28. 28.The price of a school bag changes from ₹4280 to ₹5564. By what percent did it go up?
  29. 29.The price of a bicycle is ₹1380. It goes up by 5%. What is the new price (in ₹)?
  30. 30.A price goes up by 10% and then comes down by 5%. By what percent has it gone up in all? =
  31. 31.A water tank holds 4800 litres. 40% of the water is used. How many litres are left?
  32. 32.The price of a school bag changes from ₹2300 to ₹2530. By what percent did it go up?
  33. 33.A price goes up by 50% and then comes down by 20%. By what percent has it gone up in all? =
  34. 34.The price of a bicycle is ₹460. It goes up by 5%. What is the new price (in ₹)?
  35. 35.The price of a school bag changes from ₹2500 to ₹2750. By what percent did it go up?
  36. 36.The price of a school bag changes from ₹2340 to ₹1638. By what percent did it come down?
  37. 37.The price of a bicycle is ₹500. It goes up by 5%. What is the new price (in ₹)?
  38. 38.A water tank holds 1300 litres. 50% of the water is used. How many litres are left?
  39. 39.A town has 2460 people. Its population grows by 50%. How many people live there now?
  40. 40.A price goes up by 20% and then goes up by 20% more. By what percent has it gone up in all? =

Answer key

  1. 25
  2. 52.5
  3. 20
  4. 3162
  5. 1584
  6. 2088
  7. 6160
  8. 120
  9. 25
  10. 2100
  11. 15
  12. 3726
  13. 40
  14. 30
  15. 1425
  16. 30
  17. 21
  18. 5880
  19. 40
  20. 756
  21. 25
  22. 1998
  23. 3600
  24. 1638
  25. 150
  26. 1428
  27. 32
  28. 30
  29. 1449
  30. 4.5
  31. 2880
  32. 10
  33. 20
  34. 483
  35. 10
  36. 30
  37. 525
  38. 650
  39. 3690
  40. 44

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