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Simplest Form Fractions Worksheet

Fractions lesson 8: Simplest form of a fraction · Set 45 · 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 12/18 in its simplest form. =
  2. 2.Write 8/10 in its simplest form. =
  3. 3.Is 20/36 in its simplest form? (a) No (b) Yes
  4. 4.Write 25/30 in its simplest form. =
  5. 5.What is the HCF of 24 and 30?
  6. 6.What is the HCF of 6 and 15?
  7. 7.Write 25/35 in its simplest form. =
  8. 8.What is the HCF of 45 and 81?
  9. 9.Is 3/7 in its simplest form? (a) No (b) Yes
  10. 10.Is 2/7 in its simplest form? (a) Yes (b) No
  11. 11.Write 21/27 in its simplest form. =
  12. 12.Write 40/56 in its simplest form. =
  13. 13.Is 4/18 in its simplest form? (a) No (b) Yes
  14. 14.Write 35/40 in its simplest form. =
  15. 15.Is 5/7 in its simplest form? (a) No (b) Yes
  16. 16.Is 7/8 in its simplest form? (a) No (b) Yes
  17. 17.What is the HCF of 42 and 54?
  18. 18.Is 3/15 in its simplest form? (a) No (b) Yes
  19. 19.Write 2/14 in its simplest form. =
  20. 20.Is 5/9 in its simplest form? (a) Yes (b) No
  21. 21.What is the HCF of 36 and 63?
  22. 22.What is the HCF of 8 and 20?
  23. 23.Write 15/50 in its simplest form. =
  24. 24.Is 3/4 in its simplest form? (a) Yes (b) No
  25. 25.Write 6/12 in its simplest form. =
  26. 26.Is 9/21 in its simplest form? (a) No (b) Yes
  27. 27.What is the HCF of 12 and 21?
  28. 28.What is the HCF of 8 and 80?
  29. 29.Is 8/9 in its simplest form? (a) Yes (b) No
  30. 30.Is 6/15 in its simplest form? (a) No (b) Yes
  31. 31.What is the HCF of 30 and 42?
  32. 32.Write 28/36 in its simplest form. =
  33. 33.Write 24/28 in its simplest form. =
  34. 34.Is 2/3 in its simplest form? (a) Yes (b) No
  35. 35.What is the HCF of 4 and 8?
  36. 36.What is the HCF of 45 and 54?
  37. 37.What is the HCF of 21 and 30?
  38. 38.What is the HCF of 16 and 24?
  39. 39.Write 18/81 in its simplest form. =
  40. 40.What is the HCF of 6 and 24?

Answer key

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

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