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Simplest Form Fractions Worksheet

Fractions lesson 8: Simplest form of a fraction · Set 22 · 40 questions
TalentJR

The method (Divide by the HCF): Find the HCF (highest common factor) of the top and the bottom. Divide the top and the bottom by the HCF. If the HCF is 1, the fraction is already in its simplest form.

NameDateTime takenScore ___ / 40
  1. 1.Write 30/48 in its simplest form. =
  2. 2.Write 18/20 in its simplest form. =
  3. 3.Write 12/27 in its simplest form. =
  4. 4.Write 72/81 in its simplest form. =
  5. 5.What is the HCF of 2 and 12?
  6. 6.What is the HCF of 40 and 72?
  7. 7.What is the HCF of 42 and 48?
  8. 8.Is 5/40 in its simplest form? (a) No (b) Yes
  9. 9.Write 4/12 in its simplest form. =
  10. 10.What is the HCF of 2 and 10?
  11. 11.Write 4/18 in its simplest form. =
  12. 12.Write 21/70 in its simplest form. =
  13. 13.Write 8/20 in its simplest form. =
  14. 14.What is the HCF of 18 and 45?
  15. 15.What is the HCF of 12 and 15?
  16. 16.What is the HCF of 5 and 20?
  17. 17.Write 63/72 in its simplest form. =
  18. 18.What is the HCF of 3 and 15?
  19. 19.What is the HCF of 9 and 15?
  20. 20.Is 4/18 in its simplest form? (a) Yes (b) No
  21. 21.Write 63/81 in its simplest form. =
  22. 22.Is 15/25 in its simplest form? (a) No (b) Yes
  23. 23.Write 9/12 in its simplest form. =
  24. 24.Write 6/20 in its simplest form. =
  25. 25.Write 21/49 in its simplest form. =
  26. 26.Write 16/40 in its simplest form. =
  27. 27.Write 9/27 in its simplest form. =
  28. 28.What is the HCF of 35 and 63?
  29. 29.Write 63/70 in its simplest form. =
  30. 30.What is the HCF of 24 and 28?
  31. 31.Write 16/24 in its simplest form. =
  32. 32.Is 6/20 in its simplest form? (a) No (b) Yes
  33. 33.What is the HCF of 36 and 42?
  34. 34.Write 27/72 in its simplest form. =
  35. 35.Write 3/15 in its simplest form. =
  36. 36.What is the HCF of 32 and 56?
  37. 37.Write 10/18 in its simplest form. =
  38. 38.Is 20/24 in its simplest form? (a) Yes (b) No
  39. 39.Write 6/10 in its simplest form. =
  40. 40.What is the HCF of 4 and 24?

Answer key

  1. 5/8
  2. 9/10
  3. 4/9
  4. 8/9
  5. 2
  6. 8
  7. 6
  8. No
  9. 1/3
  10. 2
  11. 2/9
  12. 3/10
  13. 2/5
  14. 9
  15. 3
  16. 5
  17. 7/8
  18. 3
  19. 3
  20. No
  21. 7/9
  22. No
  23. 3/4
  24. 3/10
  25. 3/7
  26. 2/5
  27. 1/3
  28. 7
  29. 9/10
  30. 4
  31. 2/3
  32. No
  33. 6
  34. 3/8
  35. 1/5
  36. 8
  37. 5/9
  38. No
  39. 3/5
  40. 4

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