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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 648 · 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 price comes down by 30% and then comes down by 15% more. By what percent has it come down in all? =
  2. 2.A price goes up by 20% and then goes up by 15% more. By what percent has it gone up in all? =
  3. 3.A water tank holds 4320 litres. 40% of the water is used. How many litres are left?
  4. 4.A water tank holds 1800 litres. 5% of the water is used. How many litres are left?
  5. 5.A price comes down by 40% and then comes down by 5% more. By what percent has it come down in all? =
  6. 6.The price of a school bag changes from ₹4040 to ₹2020. By what percent did it come down?
  7. 7.A water tank holds 3320 litres. 50% of the water is used. How many litres are left?
  8. 8.A price goes up by 40% and then goes up by 30% more. By what percent has it gone up in all? =
  9. 9.A water tank holds 400 litres. 30% of the water is used. How many litres are left?
  10. 10.A water tank holds 3300 litres. 30% of the water is used. How many litres are left?
  11. 11.A water tank holds 1220 litres. 50% of the water is used. How many litres are left?
  12. 12.A price goes up by 15% and then goes up by 20% more. By what percent has it gone up in all? =
  13. 13.A price goes up by 10% and then goes up by 30% more. By what percent has it gone up in all? =
  14. 14.The price of a school bag changes from ₹4200 to ₹5880. By what percent did it go up?
  15. 15.The price of a bicycle is ₹3780. It goes up by 5%. What is the new price (in ₹)?
  16. 16.The price of a bicycle is ₹3200. It goes up by 40%. What is the new price (in ₹)?
  17. 17.A water tank holds 4920 litres. 5% of the water is used. How many litres are left?
  18. 18.The price of a school bag changes from ₹1560 to ₹1950. By what percent did it go up?
  19. 19.A shop sells 4980 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  20. 20.A water tank holds 3200 litres. 15% of the water is used. How many litres are left?
  21. 21.The price of a school bag changes from ₹4120 to ₹4532. By what percent did it go up?
  22. 22.A price goes up by 15% and then comes down by 5%. By what percent has it gone up in all? =
  23. 23.A shop sells 1340 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  24. 24.A water tank holds 4680 litres. 30% of the water is used. How many litres are left?
  25. 25.A water tank holds 3640 litres. 20% of the water is used. How many litres are left?
  26. 26.A water tank holds 4940 litres. 5% of the water is used. How many litres are left?
  27. 27.A water tank holds 2660 litres. 10% of the water is used. How many litres are left?
  28. 28.A shop sells 1320 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 bicycle is ₹1520. It goes up by 10%. What is the new price (in ₹)?
  30. 30.The price of a bicycle is ₹3980. It goes up by 10%. What is the new price (in ₹)?
  31. 31.The price of a school bag changes from ₹2020 to ₹1515. By what percent did it come down?
  32. 32.A water tank holds 1260 litres. 10% of the water is used. How many litres are left?
  33. 33.A price goes up by 15% and then comes down by 10%. By what percent has it gone up in all? =
  34. 34.A water tank holds 1440 litres. 20% of the water is used. How many litres are left?
  35. 35.A town has 1340 people. Its population grows by 10%. How many people live there now?
  36. 36.A price goes up by 25% and then goes up by 15% more. By what percent has it gone up in all? =
  37. 37.A price goes up by 50% and then goes up by 25% more. By what percent has it gone up in all? =
  38. 38.A price goes up by 25% and then comes down by 15%. By what percent has it gone up in all? =
  39. 39.A town has 1220 people. Its population grows by 25%. How many people live there now?
  40. 40.A town has 3920 people. Its population grows by 20%. How many people live there now?

Answer key

  1. 40.5
  2. 38
  3. 2592
  4. 1710
  5. 43
  6. 50
  7. 1660
  8. 82
  9. 280
  10. 2310
  11. 610
  12. 38
  13. 43
  14. 40
  15. 3969
  16. 4480
  17. 4674
  18. 25
  19. 5229
  20. 2720
  21. 10
  22. 9.25
  23. 1541
  24. 3276
  25. 2912
  26. 4693
  27. 2394
  28. 1584
  29. 1672
  30. 4378
  31. 25
  32. 1134
  33. 3.5
  34. 1152
  35. 1474
  36. 43.75
  37. 87.5
  38. 6.25
  39. 1525
  40. 4704

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