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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 295 · 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 240 litres. 25% of the water is used. How many litres are left?
  2. 2.A water tank holds 1460 litres. 40% of the water is used. How many litres are left?
  3. 3.A water tank holds 1360 litres. 15% of the water is used. How many litres are left?
  4. 4.A water tank holds 4800 litres. 5% of the water is used. How many litres are left?
  5. 5.A water tank holds 3260 litres. 30% of the water is used. How many litres are left?
  6. 6.A town has 4700 people. Its population grows by 5%. How many people live there now?
  7. 7.A water tank holds 2440 litres. 20% of the water is used. How many litres are left?
  8. 8.A water tank holds 700 litres. 25% of the water is used. How many litres are left?
  9. 9.A price comes down by 5% and then comes down by 25% more. By what percent has it come down in all? =
  10. 10.The price of a school bag changes from ₹4640 to ₹5568. By what percent did it go up?
  11. 11.The price of a school bag changes from ₹2200 to ₹2420. By what percent did it go up?
  12. 12.The price of a school bag changes from ₹660 to ₹594. By what percent did it come down?
  13. 13.A price comes down by 10% and then comes down by 25% more. By what percent has it come down in all? =
  14. 14.A water tank holds 800 litres. 50% of the water is used. How many litres are left?
  15. 15.A water tank holds 4260 litres. 15% of the water is used. How many litres are left?
  16. 16.The price of a bicycle is ₹3740. It goes up by 50%. What is the new price (in ₹)?
  17. 17.The price of a school bag changes from ₹2380 to ₹1785. By what percent did it come down?
  18. 18.A water tank holds 1760 litres. 20% of the water is used. How many litres are left?
  19. 19.A water tank holds 4060 litres. 30% of the water is used. How many litres are left?
  20. 20.A town has 3520 people. Its population grows by 50%. How many people live there now?
  21. 21.The price of a school bag changes from ₹1400 to ₹1190. By what percent did it come down?
  22. 22.A town has 3840 people. Its population grows by 50%. How many people live there now?
  23. 23.The price of a school bag changes from ₹2200 to ₹2530. By what percent did it go up?
  24. 24.A water tank holds 3060 litres. 10% of the water is used. How many litres are left?
  25. 25.A water tank holds 2220 litres. 5% of the water is used. How many litres are left?
  26. 26.A shop sells 640 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  27. 27.The price of a school bag changes from ₹4780 to ₹2390. By what percent did it come down?
  28. 28.A price goes up by 10% and then goes up by 5% more. By what percent has it gone up in all? =
  29. 29.A price goes up by 10% and then goes up by 40% more. By what percent has it gone up in all? =
  30. 30.A water tank holds 2280 litres. 30% of the water is used. How many litres are left?
  31. 31.A town has 3240 people. Its population grows by 10%. How many people live there now?
  32. 32.The price of a school bag changes from ₹3680 to ₹3312. By what percent did it come down?
  33. 33.A water tank holds 3120 litres. 30% of the water is used. How many litres are left?
  34. 34.The price of a bicycle is ₹180. It goes up by 40%. What is the new price (in ₹)?
  35. 35.The price of a school bag changes from ₹4460 to ₹5575. By what percent did it go up?
  36. 36.The price of a bicycle is ₹2220. It goes up by 20%. What is the new price (in ₹)?
  37. 37.A water tank holds 3460 litres. 10% of the water is used. How many litres are left?
  38. 38.A water tank holds 1280 litres. 25% of the water is used. How many litres are left?
  39. 39.A price comes down by 30% and then comes down by 5% more. By what percent has it come down in all? =
  40. 40.The price of a bicycle is ₹1320. It goes up by 10%. What is the new price (in ₹)?

Answer key

  1. 180
  2. 876
  3. 1156
  4. 4560
  5. 2282
  6. 4935
  7. 1952
  8. 525
  9. 28.75
  10. 20
  11. 10
  12. 10
  13. 32.5
  14. 400
  15. 3621
  16. 5610
  17. 25
  18. 1408
  19. 2842
  20. 5280
  21. 15
  22. 5760
  23. 15
  24. 2754
  25. 2109
  26. 896
  27. 50
  28. 15.5
  29. 54
  30. 1596
  31. 3564
  32. 10
  33. 2184
  34. 252
  35. 25
  36. 2664
  37. 3114
  38. 960
  39. 33.5
  40. 1452

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