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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 471 · 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 ₹740 to ₹851. By what percent did it go up?
  2. 2.A water tank holds 3940 litres. 10% of the water is used. How many litres are left?
  3. 3.The price of a bicycle is ₹3980. It goes up by 15%. What is the new price (in ₹)?
  4. 4.The price of a bicycle is ₹4760. It goes up by 5%. What is the new price (in ₹)?
  5. 5.A price goes up by 15% and then comes down by 10%. By what percent has it gone up in all? =
  6. 6.A water tank holds 1080 litres. 15% of the water is used. How many litres are left?
  7. 7.A water tank holds 1040 litres. 5% of the water is used. How many litres are left?
  8. 8.A price comes down by 15% and then comes down by 50% more. By what percent has it come down in all? =
  9. 9.A water tank holds 4180 litres. 25% of the water is used. How many litres are left?
  10. 10.The price of a school bag changes from ₹1280 to ₹1344. By what percent did it go up?
  11. 11.A price comes down by 20% and then comes down by 20% more. By what percent has it come down in all? =
  12. 12.A shop sells 1360 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  13. 13.A town has 4660 people. Its population grows by 15%. How many people live there now?
  14. 14.A water tank holds 2640 litres. 30% of the water is used. How many litres are left?
  15. 15.A price goes up by 20% and then comes down by 10%. By what percent has it gone up in all? =
  16. 16.The price of a school bag changes from ₹4080 to ₹5100. By what percent did it go up?
  17. 17.The price of a school bag changes from ₹3220 to ₹2737. By what percent did it come down?
  18. 18.A town has 2980 people. Its population grows by 50%. How many people live there now?
  19. 19.A price comes down by 5% and then comes down by 10% more. By what percent has it come down in all? =
  20. 20.A price goes up by 40% and then goes up by 5% more. By what percent has it gone up in all? =
  21. 21.A water tank holds 3100 litres. 40% of the water is used. How many litres are left?
  22. 22.The price of a bicycle is ₹4400. It goes up by 50%. What is the new price (in ₹)?
  23. 23.A water tank holds 1840 litres. 40% of the water is used. How many litres are left?
  24. 24.A water tank holds 4040 litres. 10% of the water is used. How many litres are left?
  25. 25.The price of a bicycle is ₹700. It goes up by 25%. What is the new price (in ₹)?
  26. 26.The price of a school bag changes from ₹1340 to ₹1407. By what percent did it go up?
  27. 27.A price goes up by 50% and then comes down by 5%. By what percent has it gone up in all? =
  28. 28.A shop sells 700 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  29. 29.The price of a school bag changes from ₹1680 to ₹1512. By what percent did it come down?
  30. 30.A price goes up by 20% and then goes up by 30% more. By what percent has it gone up in all? =
  31. 31.A price comes down by 25% and then comes down by 40% more. By what percent has it come down in all? =
  32. 32.A shop sells 1440 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  33. 33.A price goes up by 20% and then comes down by 15%. By what percent has it gone up in all? =
  34. 34.The price of a school bag changes from ₹860 to ₹1032. By what percent did it go up?
  35. 35.The price of a school bag changes from ₹3940 to ₹3152. By what percent did it come down?
  36. 36.A price comes down by 20% and then comes down by 15% more. By what percent has it come down in all? =
  37. 37.A water tank holds 380 litres. 25% of the water is used. How many litres are left?
  38. 38.A water tank holds 2720 litres. 15% of the water is used. How many litres are left?
  39. 39.A price goes up by 40% and then goes up by 50% more. By what percent has it gone up in all? =
  40. 40.A water tank holds 4320 litres. 15% of the water is used. How many litres are left?

Answer key

  1. 15
  2. 3546
  3. 4577
  4. 4998
  5. 3.5
  6. 918
  7. 988
  8. 57.5
  9. 3135
  10. 5
  11. 36
  12. 1904
  13. 5359
  14. 1848
  15. 8
  16. 25
  17. 15
  18. 4470
  19. 14.5
  20. 47
  21. 1860
  22. 6600
  23. 1104
  24. 3636
  25. 875
  26. 5
  27. 42.5
  28. 840
  29. 10
  30. 56
  31. 55
  32. 1656
  33. 2
  34. 20
  35. 20
  36. 32
  37. 285
  38. 2312
  39. 110
  40. 3672

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