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Simplest Form Fractions Worksheet

Fractions lesson 8: Simplest form of a fraction · Set 441 · 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.What is the HCF of 54 and 60?
  2. 2.What is the HCF of 7 and 42?
  3. 3.What is the HCF of 27 and 30?
  4. 4.What is the HCF of 12 and 14?
  5. 5.What is the HCF of 18 and 81?
  6. 6.Is 10/45 in its simplest form? (a) Yes (b) No
  7. 7.What is the HCF of 4 and 24?
  8. 8.What is the HCF of 54 and 63?
  9. 9.Write 30/36 in its simplest form. =
  10. 10.Write 9/15 in its simplest form. =
  11. 11.Write 2/6 in its simplest form. =
  12. 12.Is 1/10 in its simplest form? (a) Yes (b) No
  13. 13.Is 1/5 in its simplest form? (a) Yes (b) No
  14. 14.Write 36/42 in its simplest form. =
  15. 15.Is 54/60 in its simplest form? (a) No (b) Yes
  16. 16.Write 12/15 in its simplest form. =
  17. 17.Is 15/18 in its simplest form? (a) No (b) Yes
  18. 18.What is the HCF of 6 and 14?
  19. 19.Is 7/9 in its simplest form? (a) No (b) Yes
  20. 20.What is the HCF of 40 and 45?
  21. 21.Write 20/35 in its simplest form. =
  22. 22.What is the HCF of 15 and 21?
  23. 23.Is 1/2 in its simplest form? (a) Yes (b) No
  24. 24.What is the HCF of 45 and 63?
  25. 25.What is the HCF of 63 and 90?
  26. 26.What is the HCF of 12 and 18?
  27. 27.Is 28/40 in its simplest form? (a) No (b) Yes
  28. 28.What is the HCF of 9 and 30?
  29. 29.Write 3/9 in its simplest form. =
  30. 30.Is 3/12 in its simplest form? (a) No (b) Yes
  31. 31.Write 45/81 in its simplest form. =
  32. 32.Is 9/10 in its simplest form? (a) No (b) Yes
  33. 33.What is the HCF of 24 and 40?
  34. 34.What is the HCF of 3 and 18?
  35. 35.Write 3/21 in its simplest form. =
  36. 36.What is the HCF of 9 and 45?
  37. 37.Write 10/16 in its simplest form. =
  38. 38.Write 28/63 in its simplest form. =
  39. 39.Is 3/4 in its simplest form? (a) Yes (b) No
  40. 40.Is 4/7 in its simplest form? (a) No (b) Yes

Answer key

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

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