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Simplest Form Fractions Worksheet

Fractions lesson 8: Simplest form of a fraction · Set 47 · 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.Is 1/9 in its simplest form? (a) No (b) Yes
  2. 2.Is 28/36 in its simplest form? (a) Yes (b) No
  3. 3.Is 7/10 in its simplest form? (a) Yes (b) No
  4. 4.Write 21/28 in its simplest form. =
  5. 5.What is the HCF of 64 and 72?
  6. 6.Write 9/72 in its simplest form. =
  7. 7.What is the HCF of 8 and 12?
  8. 8.Is 18/20 in its simplest form? (a) Yes (b) No
  9. 9.Write 9/18 in its simplest form. =
  10. 10.Write 8/18 in its simplest form. =
  11. 11.Is 15/21 in its simplest form? (a) No (b) Yes
  12. 12.What is the HCF of 16 and 28?
  13. 13.What is the HCF of 5 and 45?
  14. 14.Write 3/6 in its simplest form. =
  15. 15.What is the HCF of 63 and 70?
  16. 16.Write 20/35 in its simplest form. =
  17. 17.Write 45/63 in its simplest form. =
  18. 18.What is the HCF of 12 and 21?
  19. 19.Write 14/16 in its simplest form. =
  20. 20.Is 8/28 in its simplest form? (a) Yes (b) No
  21. 21.What is the HCF of 35 and 50?
  22. 22.Write 4/14 in its simplest form. =
  23. 23.Write 2/14 in its simplest form. =
  24. 24.Write 12/30 in its simplest form. =
  25. 25.What is the HCF of 25 and 45?
  26. 26.Is 5/8 in its simplest form? (a) No (b) Yes
  27. 27.What is the HCF of 16 and 56?
  28. 28.What is the HCF of 35 and 40?
  29. 29.Is 36/42 in its simplest form? (a) No (b) Yes
  30. 30.Write 12/15 in its simplest form. =
  31. 31.Write 9/63 in its simplest form. =
  32. 32.What is the HCF of 54 and 63?
  33. 33.What is the HCF of 56 and 64?
  34. 34.Is 3/10 in its simplest form? (a) No (b) Yes
  35. 35.Write 40/48 in its simplest form. =
  36. 36.Is 1/5 in its simplest form? (a) Yes (b) No
  37. 37.Is 6/36 in its simplest form? (a) No (b) Yes
  38. 38.Is 2/5 in its simplest form? (a) No (b) Yes
  39. 39.Is 1/6 in its simplest form? (a) No (b) Yes
  40. 40.What is the HCF of 18 and 20?

Answer key

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

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