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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 247 · 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 shop sells 3440 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  2. 2.A water tank holds 4660 litres. 25% of the water is used. How many litres are left?
  3. 3.A price goes up by 15% and then goes up by 30% more. By what percent has it gone up in all? =
  4. 4.A price comes down by 25% and then comes down by 20% more. By what percent has it come down in all? =
  5. 5.A town has 700 people. Its population grows by 40%. How many people live there now?
  6. 6.A town has 1900 people. Its population grows by 30%. How many people live there now?
  7. 7.The price of a bicycle is ₹3800. It goes up by 25%. What is the new price (in ₹)?
  8. 8.The price of a school bag changes from ₹4620 to ₹2310. By what percent did it come down?
  9. 9.The price of a bicycle is ₹1780. It goes up by 5%. What is the new price (in ₹)?
  10. 10.The price of a school bag changes from ₹4120 to ₹5768. By what percent did it go up?
  11. 11.The price of a school bag changes from ₹2020 to ₹2424. By what percent did it go up?
  12. 12.A water tank holds 2280 litres. 5% of the water is used. How many litres are left?
  13. 13.A town has 420 people. Its population grows by 20%. How many people live there now?
  14. 14.A town has 1460 people. Its population grows by 20%. How many people live there now?
  15. 15.The price of a school bag changes from ₹1420 to ₹1704. By what percent did it go up?
  16. 16.A water tank holds 3840 litres. 30% of the water is used. How many litres are left?
  17. 17.A town has 3940 people. Its population grows by 40%. How many people live there now?
  18. 18.A price goes up by 15% and then goes up by 15% more. By what percent has it gone up in all? =
  19. 19.The price of a school bag changes from ₹4480 to ₹5824. By what percent did it go up?
  20. 20.A price comes down by 25% and then comes down by 15% more. By what percent has it come down in all? =
  21. 21.A water tank holds 3440 litres. 40% of the water is used. How many litres are left?
  22. 22.A price comes down by 30% and then comes down by 15% more. By what percent has it come down in all? =
  23. 23.The price of a school bag changes from ₹3360 to ₹3864. By what percent did it go up?
  24. 24.A price comes down by 15% and then comes down by 20% more. By what percent has it come down in all? =
  25. 25.A shop sells 3780 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  26. 26.A water tank holds 1900 litres. 40% of the water is used. How many litres are left?
  27. 27.A water tank holds 2080 litres. 20% of the water is used. How many litres are left?
  28. 28.A water tank holds 1240 litres. 40% of the water is used. How many litres are left?
  29. 29.A water tank holds 2280 litres. 25% of the water is used. How many litres are left?
  30. 30.The price of a school bag changes from ₹1840 to ₹1380. By what percent did it come down?
  31. 31.The price of a school bag changes from ₹960 to ₹1152. By what percent did it go up?
  32. 32.A price comes down by 5% and then comes down by 10% more. By what percent has it come down in all? =
  33. 33.A price goes up by 30% and then comes down by 5%. By what percent has it gone up in all? =
  34. 34.A water tank holds 3760 litres. 15% of the water is used. How many litres are left?
  35. 35.A water tank holds 320 litres. 25% of the water is used. How many litres are left?
  36. 36.A town has 1100 people. Its population grows by 40%. How many people live there now?
  37. 37.A water tank holds 660 litres. 20% of the water is used. How many litres are left?
  38. 38.The price of a bicycle is ₹760. It goes up by 30%. What is the new price (in ₹)?
  39. 39.A price goes up by 20% and then comes down by 5%. By what percent has it gone up in all? =
  40. 40.A water tank holds 1800 litres. 25% of the water is used. How many litres are left?

Answer key

  1. 4128
  2. 3495
  3. 49.5
  4. 40
  5. 980
  6. 2470
  7. 4750
  8. 50
  9. 1869
  10. 40
  11. 20
  12. 2166
  13. 504
  14. 1752
  15. 20
  16. 2688
  17. 5516
  18. 32.25
  19. 30
  20. 36.25
  21. 2064
  22. 40.5
  23. 15
  24. 32
  25. 4158
  26. 1140
  27. 1664
  28. 744
  29. 1710
  30. 25
  31. 20
  32. 14.5
  33. 23.5
  34. 3196
  35. 240
  36. 1540
  37. 528
  38. 988
  39. 14
  40. 1350

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