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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 525 · 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 4860 people. Its population grows by 30%. How many people live there now?
  2. 2.A water tank holds 4660 litres. 50% of the water is used. How many litres are left?
  3. 3.The price of a school bag changes from ₹4060 to ₹4263. By what percent did it go up?
  4. 4.A price comes down by 20% and then comes down by 50% more. By what percent has it come down in all? =
  5. 5.A water tank holds 220 litres. 15% of the water is used. How many litres are left?
  6. 6.A shop sells 1140 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  7. 7.The price of a school bag changes from ₹2980 to ₹3725. By what percent did it go up?
  8. 8.A price goes up by 15% and then goes up by 30% more. By what percent has it gone up in all? =
  9. 9.A town has 1100 people. Its population grows by 20%. How many people live there now?
  10. 10.A price goes up by 25% and then comes down by 10%. By what percent has it gone up in all? =
  11. 11.The price of a bicycle is ₹1140. It goes up by 20%. What is the new price (in ₹)?
  12. 12.A price goes up by 10% and then goes up by 15% more. By what percent has it gone up in all? =
  13. 13.The price of a school bag changes from ₹1000 to ₹750. By what percent did it come down?
  14. 14.A price comes down by 5% and then comes down by 15% more. By what percent has it come down in all? =
  15. 15.The price of a school bag changes from ₹700 to ₹665. By what percent did it come down?
  16. 16.A town has 3420 people. Its population grows by 5%. How many people live there now?
  17. 17.The price of a school bag changes from ₹380 to ₹494. By what percent did it go up?
  18. 18.The price of a bicycle is ₹3300. It goes up by 10%. What is the new price (in ₹)?
  19. 19.The price of a bicycle is ₹4420. It goes up by 40%. What is the new price (in ₹)?
  20. 20.A water tank holds 2300 litres. 25% of the water is used. How many litres are left?
  21. 21.The price of a bicycle is ₹1820. It goes up by 5%. What is the new price (in ₹)?
  22. 22.A price comes down by 5% and then comes down by 50% more. By what percent has it come down in all? =
  23. 23.The price of a school bag changes from ₹2100 to ₹2625. By what percent did it go up?
  24. 24.A water tank holds 520 litres. 10% of the water is used. How many litres are left?
  25. 25.A water tank holds 1840 litres. 50% of the water is used. How many litres are left?
  26. 26.The price of a school bag changes from ₹4040 to ₹5252. By what percent did it go up?
  27. 27.A town has 2140 people. Its population grows by 10%. How many people live there now?
  28. 28.A shop sells 1740 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  29. 29.The price of a school bag changes from ₹2200 to ₹1870. By what percent did it come down?
  30. 30.A water tank holds 3640 litres. 20% of the water is used. How many litres are left?
  31. 31.A water tank holds 2020 litres. 15% of the water is used. How many litres are left?
  32. 32.A price comes down by 20% and then comes down by 10% more. By what percent has it come down in all? =
  33. 33.A water tank holds 180 litres. 30% of the water is used. How many litres are left?
  34. 34.The price of a school bag changes from ₹3840 to ₹5760. By what percent did it go up?
  35. 35.The price of a bicycle is ₹1260. It goes up by 25%. What is the new price (in ₹)?
  36. 36.A shop sells 2740 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  37. 37.A price goes up by 20% and then comes down by 10%. By what percent has it gone up in all? =
  38. 38.A town has 1960 people. Its population grows by 25%. How many people live there now?
  39. 39.A water tank holds 4000 litres. 30% of the water is used. How many litres are left?
  40. 40.The price of a school bag changes from ₹700 to ₹630. By what percent did it come down?

Answer key

  1. 6318
  2. 2330
  3. 5
  4. 60
  5. 187
  6. 1197
  7. 25
  8. 49.5
  9. 1320
  10. 12.5
  11. 1368
  12. 26.5
  13. 25
  14. 19.25
  15. 5
  16. 3591
  17. 30
  18. 3630
  19. 6188
  20. 1725
  21. 1911
  22. 52.5
  23. 25
  24. 468
  25. 920
  26. 30
  27. 2354
  28. 2610
  29. 15
  30. 2912
  31. 1717
  32. 28
  33. 126
  34. 50
  35. 1575
  36. 3151
  37. 8
  38. 2450
  39. 2800
  40. 10

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