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Simplest Form Fractions Worksheet

Fractions lesson 8: Simplest form of a fraction · Set 900 · 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 81 and 90?
  2. 2.Is 5/7 in its simplest form? (a) No (b) Yes
  3. 3.Is 2/5 in its simplest form? (a) Yes (b) No
  4. 4.What is the HCF of 12 and 28?
  5. 5.What is the HCF of 24 and 56?
  6. 6.Is 35/50 in its simplest form? (a) No (b) Yes
  7. 7.Is 15/40 in its simplest form? (a) No (b) Yes
  8. 8.Write 12/27 in its simplest form. =
  9. 9.Write 4/6 in its simplest form. =
  10. 10.What is the HCF of 30 and 48?
  11. 11.What is the HCF of 27 and 72?
  12. 12.Write 10/45 in its simplest form. =
  13. 13.What is the HCF of 35 and 45?
  14. 14.Write 32/40 in its simplest form. =
  15. 15.What is the HCF of 25 and 40?
  16. 16.Write 7/42 in its simplest form. =
  17. 17.What is the HCF of 5 and 50?
  18. 18.What is the HCF of 49 and 56?
  19. 19.Write 2/12 in its simplest form. =
  20. 20.Write 6/30 in its simplest form. =
  21. 21.Write 8/20 in its simplest form. =
  22. 22.What is the HCF of 18 and 81?
  23. 23.Write 24/54 in its simplest form. =
  24. 24.What is the HCF of 6 and 12?
  25. 25.Write 24/40 in its simplest form. =
  26. 26.Write 27/90 in its simplest form. =
  27. 27.Is 5/8 in its simplest form? (a) Yes (b) No
  28. 28.Is 6/9 in its simplest form? (a) Yes (b) No
  29. 29.Is 2/12 in its simplest form? (a) Yes (b) No
  30. 30.Write 3/30 in its simplest form. =
  31. 31.Write 6/14 in its simplest form. =
  32. 32.Write 25/45 in its simplest form. =
  33. 33.Write 7/14 in its simplest form. =
  34. 34.Write 8/18 in its simplest form. =
  35. 35.Write 9/15 in its simplest form. =
  36. 36.Write 8/28 in its simplest form. =
  37. 37.Is 20/25 in its simplest form? (a) Yes (b) No
  38. 38.Write 21/24 in its simplest form. =
  39. 39.Is 8/9 in its simplest form? (a) Yes (b) No
  40. 40.Is 3/27 in its simplest form? (a) No (b) Yes

Answer key

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

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