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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 374 · 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 1140 litres. 20% of the water is used. How many litres are left?
  2. 2.The price of a school bag changes from ₹1180 to ₹1239. By what percent did it go up?
  3. 3.A price comes down by 5% and then comes down by 15% more. By what percent has it come down in all? =
  4. 4.The price of a bicycle is ₹2840. It goes up by 5%. What is the new price (in ₹)?
  5. 5.The price of a bicycle is ₹1020. It goes up by 40%. What is the new price (in ₹)?
  6. 6.A shop sells 4280 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  7. 7.A water tank holds 800 litres. 20% of the water is used. How many litres are left?
  8. 8.A water tank holds 2660 litres. 20% of the water is used. How many litres are left?
  9. 9.A town has 280 people. Its population grows by 25%. How many people live there now?
  10. 10.The price of a bicycle is ₹2280. It goes up by 5%. What is the new price (in ₹)?
  11. 11.A price goes up by 40% and then comes down by 20%. By what percent has it gone up in all? =
  12. 12.A water tank holds 4300 litres. 20% of the water is used. How many litres are left?
  13. 13.The price of a bicycle is ₹1620. It goes up by 25%. What is the new price (in ₹)?
  14. 14.A water tank holds 3560 litres. 40% of the water is used. How many litres are left?
  15. 15.A water tank holds 1060 litres. 50% of the water is used. How many litres are left?
  16. 16.A price goes up by 50% and then goes up by 40% more. By what percent has it gone up in all? =
  17. 17.The price of a school bag changes from ₹3340 to ₹2672. By what percent did it come down?
  18. 18.The price of a school bag changes from ₹1780 to ₹2136. By what percent did it go up?
  19. 19.A town has 3820 people. Its population grows by 5%. How many people live there now?
  20. 20.A water tank holds 260 litres. 25% of the water is used. How many litres are left?
  21. 21.The price of a school bag changes from ₹3420 to ₹3591. By what percent did it go up?
  22. 22.The price of a school bag changes from ₹1940 to ₹2328. By what percent did it go up?
  23. 23.The price of a school bag changes from ₹3220 to ₹2254. By what percent did it come down?
  24. 24.A price comes down by 50% and then comes down by 40% more. By what percent has it come down in all? =
  25. 25.The price of a bicycle is ₹1060. It goes up by 5%. What is the new price (in ₹)?
  26. 26.The price of a bicycle is ₹3020. It goes up by 15%. What is the new price (in ₹)?
  27. 27.A water tank holds 860 litres. 5% of the water is used. How many litres are left?
  28. 28.A town has 2800 people. Its population grows by 25%. How many people live there now?
  29. 29.The price of a school bag changes from ₹2440 to ₹2806. By what percent did it go up?
  30. 30.A price comes down by 20% and then comes down by 10% more. By what percent has it come down in all? =
  31. 31.A price goes up by 40% and then goes up by 30% more. By what percent has it gone up in all? =
  32. 32.The price of a school bag changes from ₹3600 to ₹5400. By what percent did it go up?
  33. 33.A water tank holds 4400 litres. 25% of the water is used. How many litres are left?
  34. 34.A water tank holds 4380 litres. 40% of the water is used. How many litres are left?
  35. 35.A price comes down by 5% and then comes down by 10% more. By what percent has it come down in all? =
  36. 36.A water tank holds 4980 litres. 40% of the water is used. How many litres are left?
  37. 37.The price of a school bag changes from ₹3780 to ₹2268. By what percent did it come down?
  38. 38.A price comes down by 5% and then comes down by 25% more. By what percent has it come down in all? =
  39. 39.A water tank holds 2500 litres. 10% of the water is used. How many litres are left?
  40. 40.The price of a bicycle is ₹1980. It goes up by 30%. What is the new price (in ₹)?

Answer key

  1. 912
  2. 5
  3. 19.25
  4. 2982
  5. 1428
  6. 4922
  7. 640
  8. 2128
  9. 350
  10. 2394
  11. 12
  12. 3440
  13. 2025
  14. 2136
  15. 530
  16. 110
  17. 20
  18. 20
  19. 4011
  20. 195
  21. 5
  22. 20
  23. 30
  24. 70
  25. 1113
  26. 3473
  27. 817
  28. 3500
  29. 15
  30. 28
  31. 82
  32. 50
  33. 3300
  34. 2628
  35. 14.5
  36. 2988
  37. 40
  38. 28.75
  39. 2250
  40. 2574

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