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Simplest Form Fractions Worksheet

Fractions lesson 8: Simplest form of a fraction · Set 458 · 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 4/18 in its simplest form? (a) No (b) Yes
  2. 2.What is the HCF of 18 and 42?
  3. 3.Write 21/27 in its simplest form. =
  4. 4.What is the HCF of 35 and 45?
  5. 5.Write 9/21 in its simplest form. =
  6. 6.What is the HCF of 8 and 24?
  7. 7.Write 4/8 in its simplest form. =
  8. 8.What is the HCF of 3 and 15?
  9. 9.What is the HCF of 28 and 40?
  10. 10.Is 6/9 in its simplest form? (a) No (b) Yes
  11. 11.Write 8/40 in its simplest form. =
  12. 12.Write 16/72 in its simplest form. =
  13. 13.Is 3/10 in its simplest form? (a) No (b) Yes
  14. 14.Write 10/15 in its simplest form. =
  15. 15.What is the HCF of 9 and 12?
  16. 16.Write 10/14 in its simplest form. =
  17. 17.Is 5/6 in its simplest form? (a) No (b) Yes
  18. 18.Is 1/2 in its simplest form? (a) No (b) Yes
  19. 19.What is the HCF of 15 and 50?
  20. 20.Write 8/12 in its simplest form. =
  21. 21.Is 8/20 in its simplest form? (a) No (b) Yes
  22. 22.What is the HCF of 10 and 25?
  23. 23.Write 6/27 in its simplest form. =
  24. 24.Write 45/50 in its simplest form. =
  25. 25.What is the HCF of 63 and 70?
  26. 26.Is 5/9 in its simplest form? (a) No (b) Yes
  27. 27.What is the HCF of 2 and 8?
  28. 28.Is 3/5 in its simplest form? (a) No (b) Yes
  29. 29.What is the HCF of 4 and 40?
  30. 30.Is 24/54 in its simplest form? (a) No (b) Yes
  31. 31.Write 48/54 in its simplest form. =
  32. 32.Write 42/49 in its simplest form. =
  33. 33.What is the HCF of 6 and 20?
  34. 34.What is the HCF of 10 and 15?
  35. 35.Is 2/4 in its simplest form? (a) No (b) Yes
  36. 36.Is 3/21 in its simplest form? (a) Yes (b) No
  37. 37.Write 36/42 in its simplest form. =
  38. 38.What is the HCF of 12 and 32?
  39. 39.Write 35/49 in its simplest form. =
  40. 40.Is 1/7 in its simplest form? (a) Yes (b) No

Answer key

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

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