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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 397 · 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 town has 3260 people. Its population grows by 15%. How many people live there now?
  2. 2.The price of a school bag changes from ₹4140 to ₹4554. By what percent did it go up?
  3. 3.A town has 920 people. Its population grows by 50%. How many people live there now?
  4. 4.The price of a bicycle is ₹3040. It goes up by 30%. What is the new price (in ₹)?
  5. 5.The price of a school bag changes from ₹1420 to ₹710. By what percent did it come down?
  6. 6.A price goes up by 15% and then goes up by 30% more. By what percent has it gone up in all? =
  7. 7.A price comes down by 25% and then comes down by 30% more. By what percent has it come down in all? =
  8. 8.A town has 1300 people. Its population grows by 15%. How many people live there now?
  9. 9.The price of a bicycle is ₹1620. It goes up by 20%. What is the new price (in ₹)?
  10. 10.A price goes up by 25% and then comes down by 15%. By what percent has it gone up in all? =
  11. 11.A water tank holds 4360 litres. 20% of the water is used. How many litres are left?
  12. 12.A water tank holds 200 litres. 40% of the water is used. How many litres are left?
  13. 13.A price goes up by 10% and then goes up by 50% more. By what percent has it gone up in all? =
  14. 14.A shop sells 1260 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  15. 15.A price goes up by 40% and then goes up by 40% more. By what percent has it gone up in all? =
  16. 16.A price goes up by 20% and then goes up by 5% more. By what percent has it gone up in all? =
  17. 17.The price of a bicycle is ₹2000. It goes up by 40%. What is the new price (in ₹)?
  18. 18.A water tank holds 3020 litres. 30% of the water is used. How many litres are left?
  19. 19.A price goes up by 40% and then goes up by 15% more. By what percent has it gone up in all? =
  20. 20.The price of a bicycle is ₹1980. It goes up by 5%. What is the new price (in ₹)?
  21. 21.The price of a bicycle is ₹2620. It goes up by 5%. What is the new price (in ₹)?
  22. 22.A town has 1180 people. Its population grows by 30%. How many people live there now?
  23. 23.The price of a school bag changes from ₹500 to ₹450. By what percent did it come down?
  24. 24.A water tank holds 4920 litres. 30% of the water is used. How many litres are left?
  25. 25.A price comes down by 40% and then comes down by 20% more. By what percent has it come down in all? =
  26. 26.A town has 4120 people. Its population grows by 30%. How many people live there now?
  27. 27.A price comes down by 50% and then comes down by 25% more. By what percent has it come down in all? =
  28. 28.A water tank holds 4980 litres. 40% of the water is used. How many litres are left?
  29. 29.A town has 1560 people. Its population grows by 30%. How many people live there now?
  30. 30.The price of a bicycle is ₹1680. It goes up by 50%. What is the new price (in ₹)?
  31. 31.The price of a school bag changes from ₹1620 to ₹1944. By what percent did it go up?
  32. 32.A price goes up by 10% and then goes up by 30% more. By what percent has it gone up in all? =
  33. 33.A water tank holds 960 litres. 15% of the water is used. How many litres are left?
  34. 34.A town has 2700 people. Its population grows by 25%. How many people live there now?
  35. 35.The price of a school bag changes from ₹580 to ₹812. By what percent did it go up?
  36. 36.A water tank holds 900 litres. 5% of the water is used. How many litres are left?
  37. 37.A shop sells 1380 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  38. 38.A town has 4340 people. Its population grows by 30%. How many people live there now?
  39. 39.A price comes down by 40% and then comes down by 40% more. By what percent has it come down in all? =
  40. 40.The price of a school bag changes from ₹3500 to ₹3850. By what percent did it go up?

Answer key

  1. 3749
  2. 10
  3. 1380
  4. 3952
  5. 50
  6. 49.5
  7. 47.5
  8. 1495
  9. 1944
  10. 6.25
  11. 3488
  12. 120
  13. 65
  14. 1575
  15. 96
  16. 26
  17. 2800
  18. 2114
  19. 61
  20. 2079
  21. 2751
  22. 1534
  23. 10
  24. 3444
  25. 52
  26. 5356
  27. 62.5
  28. 2988
  29. 2028
  30. 2520
  31. 20
  32. 43
  33. 816
  34. 3375
  35. 40
  36. 855
  37. 1587
  38. 5642
  39. 64
  40. 10

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