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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 160 · 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 3980 people. Its population grows by 15%. How many people live there now?
  2. 2.The price of a school bag changes from ₹3940 to ₹3349. By what percent did it come down?
  3. 3.A water tank holds 60 litres. 40% of the water is used. How many litres are left?
  4. 4.The price of a school bag changes from ₹1360 to ₹1088. By what percent did it come down?
  5. 5.A price goes up by 15% and then goes up by 5% more. By what percent has it gone up in all? =
  6. 6.The price of a school bag changes from ₹2620 to ₹3013. By what percent did it go up?
  7. 7.A town has 2960 people. Its population grows by 20%. How many people live there now?
  8. 8.A town has 2800 people. Its population grows by 50%. How many people live there now?
  9. 9.A price goes up by 15% and then goes up by 10% more. By what percent has it gone up in all? =
  10. 10.A price goes up by 20% and then goes up by 30% more. By what percent has it gone up in all? =
  11. 11.The price of a school bag changes from ₹3760 to ₹1880. By what percent did it come down?
  12. 12.A price comes down by 30% and then comes down by 15% more. By what percent has it come down in all? =
  13. 13.A water tank holds 1500 litres. 20% of the water is used. How many litres are left?
  14. 14.A price goes up by 30% and then goes up by 10% more. By what percent has it gone up in all? =
  15. 15.The price of a bicycle is ₹4460. It goes up by 20%. What is the new price (in ₹)?
  16. 16.The price of a school bag changes from ₹4360 to ₹5014. By what percent did it go up?
  17. 17.The price of a bicycle is ₹1240. It goes up by 25%. What is the new price (in ₹)?
  18. 18.A water tank holds 3320 litres. 20% of the water is used. How many litres are left?
  19. 19.A water tank holds 2040 litres. 10% of the water is used. How many litres are left?
  20. 20.A water tank holds 1780 litres. 40% of the water is used. How many litres are left?
  21. 21.The price of a school bag changes from ₹3660 to ₹5124. By what percent did it go up?
  22. 22.A water tank holds 660 litres. 25% of the water is used. How many litres are left?
  23. 23.A water tank holds 4640 litres. 50% of the water is used. How many litres are left?
  24. 24.A price goes up by 20% and then comes down by 5%. By what percent has it gone up in all? =
  25. 25.A water tank holds 3720 litres. 5% of the water is used. How many litres are left?
  26. 26.The price of a bicycle is ₹2600. It goes up by 20%. What is the new price (in ₹)?
  27. 27.A water tank holds 760 litres. 40% of the water is used. How many litres are left?
  28. 28.The price of a school bag changes from ₹1620 to ₹1377. By what percent did it come down?
  29. 29.A water tank holds 3140 litres. 20% of the water is used. How many litres are left?
  30. 30.A price comes down by 15% and then comes down by 5% more. By what percent has it come down in all? =
  31. 31.The price of a school bag changes from ₹4040 to ₹4444. By what percent did it go up?
  32. 32.A water tank holds 1660 litres. 10% of the water is used. How many litres are left?
  33. 33.The price of a school bag changes from ₹360 to ₹540. By what percent did it go up?
  34. 34.A shop sells 3840 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  35. 35.A water tank holds 3440 litres. 5% of the water is used. How many litres are left?
  36. 36.A water tank holds 160 litres. 10% of the water is used. How many litres are left?
  37. 37.A price comes down by 5% and then comes down by 25% more. By what percent has it come down in all? =
  38. 38.A water tank holds 1340 litres. 50% of the water is used. How many litres are left?
  39. 39.A water tank holds 2640 litres. 20% of the water is used. How many litres are left?
  40. 40.A price comes down by 5% and then comes down by 10% more. By what percent has it come down in all? =

Answer key

  1. 4577
  2. 15
  3. 36
  4. 20
  5. 20.75
  6. 15
  7. 3552
  8. 4200
  9. 26.5
  10. 56
  11. 50
  12. 40.5
  13. 1200
  14. 43
  15. 5352
  16. 15
  17. 1550
  18. 2656
  19. 1836
  20. 1068
  21. 40
  22. 495
  23. 2320
  24. 14
  25. 3534
  26. 3120
  27. 456
  28. 15
  29. 2512
  30. 19.25
  31. 10
  32. 1494
  33. 50
  34. 5376
  35. 3268
  36. 144
  37. 28.75
  38. 670
  39. 2112
  40. 14.5

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