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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 239 · 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 water tank holds 1420 litres. 40% of the water is used. How many litres are left?
  2. 2.A town has 1080 people. Its population grows by 30%. How many people live there now?
  3. 3.A water tank holds 1620 litres. 20% of the water is used. How many litres are left?
  4. 4.The price of a school bag changes from ₹580 to ₹609. By what percent did it go up?
  5. 5.A town has 980 people. Its population grows by 30%. How many people live there now?
  6. 6.A price goes up by 5% and then goes up by 40% more. By what percent has it gone up in all? =
  7. 7.A price goes up by 5% and then goes up by 15% more. By what percent has it gone up in all? =
  8. 8.A water tank holds 4760 litres. 15% of the water is used. How many litres are left?
  9. 9.The price of a school bag changes from ₹1380 to ₹1173. By what percent did it come down?
  10. 10.The price of a bicycle is ₹1060. It goes up by 15%. What is the new price (in ₹)?
  11. 11.The price of a school bag changes from ₹1340 to ₹1541. By what percent did it go up?
  12. 12.A price goes up by 5% and then goes up by 10% more. By what percent has it gone up in all? =
  13. 13.A price comes down by 50% and then comes down by 25% more. By what percent has it come down in all? =
  14. 14.A town has 3700 people. Its population grows by 50%. How many people live there now?
  15. 15.A price comes down by 50% and then comes down by 50% more. By what percent has it come down in all? =
  16. 16.A price comes down by 10% and then comes down by 5% more. By what percent has it come down in all? =
  17. 17.The price of a school bag changes from ₹740 to ₹666. By what percent did it come down?
  18. 18.A price goes up by 5% and then goes up by 25% more. By what percent has it gone up in all? =
  19. 19.A town has 3460 people. Its population grows by 10%. How many people live there now?
  20. 20.A price goes up by 10% and then goes up by 5% more. By what percent has it gone up in all? =
  21. 21.The price of a school bag changes from ₹580 to ₹754. By what percent did it go up?
  22. 22.The price of a school bag changes from ₹520 to ₹390. By what percent did it come down?
  23. 23.A water tank holds 4900 litres. 20% of the water is used. How many litres are left?
  24. 24.A price goes up by 50% and then comes down by 5%. By what percent has it gone up in all? =
  25. 25.The price of a bicycle is ₹4740. It goes up by 50%. What is the new price (in ₹)?
  26. 26.A town has 340 people. Its population grows by 5%. How many people live there now?
  27. 27.A water tank holds 2460 litres. 20% of the water is used. How many litres are left?
  28. 28.A town has 3240 people. Its population grows by 15%. How many people live there now?
  29. 29.A water tank holds 4280 litres. 50% of the water is used. How many litres are left?
  30. 30.The price of a bicycle is ₹860. It goes up by 40%. What is the new price (in ₹)?
  31. 31.A town has 1400 people. Its population grows by 30%. How many people live there now?
  32. 32.A price comes down by 40% and then comes down by 10% more. By what percent has it come down in all? =
  33. 33.A shop sells 340 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  34. 34.The price of a school bag changes from ₹4100 to ₹5330. By what percent did it go up?
  35. 35.The price of a school bag changes from ₹3200 to ₹3520. By what percent did it go up?
  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.The price of a bicycle is ₹4940. It goes up by 30%. What is the new price (in ₹)?
  38. 38.A water tank holds 1480 litres. 50% of the water is used. How many litres are left?
  39. 39.A price goes up by 5% and then goes up by 30% more. By what percent has it gone up in all? =
  40. 40.A water tank holds 1500 litres. 25% of the water is used. How many litres are left?

Answer key

  1. 852
  2. 1404
  3. 1296
  4. 5
  5. 1274
  6. 47
  7. 20.75
  8. 4046
  9. 15
  10. 1219
  11. 15
  12. 15.5
  13. 62.5
  14. 5550
  15. 75
  16. 14.5
  17. 10
  18. 31.25
  19. 3806
  20. 15.5
  21. 30
  22. 25
  23. 3920
  24. 42.5
  25. 7110
  26. 357
  27. 1968
  28. 3726
  29. 2140
  30. 1204
  31. 1820
  32. 46
  33. 442
  34. 30
  35. 10
  36. 43.75
  37. 6422
  38. 740
  39. 36.5
  40. 1125

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