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Simplest Form Fractions Worksheet

Fractions lesson 8: Simplest form of a fraction · Set 21 · 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 21/70 in its simplest form. =
  2. 2.Write 49/56 in its simplest form. =
  3. 3.What is the HCF of 18 and 42?
  4. 4.Is 7/8 in its simplest form? (a) No (b) Yes
  5. 5.Write 9/12 in its simplest form. =
  6. 6.What is the HCF of 40 and 64?
  7. 7.Write 10/18 in its simplest form. =
  8. 8.Write 6/48 in its simplest form. =
  9. 9.Is 4/7 in its simplest form? (a) No (b) Yes
  10. 10.What is the HCF of 6 and 21?
  11. 11.Write 24/54 in its simplest form. =
  12. 12.Is 6/20 in its simplest form? (a) Yes (b) No
  13. 13.Is 5/35 in its simplest form? (a) Yes (b) No
  14. 14.Write 6/16 in its simplest form. =
  15. 15.Write 15/50 in its simplest form. =
  16. 16.What is the HCF of 7 and 42?
  17. 17.What is the HCF of 28 and 63?
  18. 18.Is 3/6 in its simplest form? (a) Yes (b) No
  19. 19.Write 6/8 in its simplest form. =
  20. 20.What is the HCF of 9 and 81?
  21. 21.Is 4/9 in its simplest form? (a) Yes (b) No
  22. 22.Write 10/15 in its simplest form. =
  23. 23.What is the HCF of 20 and 36?
  24. 24.Write 2/10 in its simplest form. =
  25. 25.Write 4/20 in its simplest form. =
  26. 26.Write 9/15 in its simplest form. =
  27. 27.Is 3/5 in its simplest form? (a) No (b) Yes
  28. 28.Is 2/8 in its simplest form? (a) Yes (b) No
  29. 29.What is the HCF of 24 and 27?
  30. 30.What is the HCF of 63 and 72?
  31. 31.What is the HCF of 18 and 45?
  32. 32.Is 3/4 in its simplest form? (a) No (b) Yes
  33. 33.Is 4/14 in its simplest form? (a) No (b) Yes
  34. 34.Is 12/18 in its simplest form? (a) Yes (b) No
  35. 35.What is the HCF of 4 and 8?
  36. 36.Is 7/9 in its simplest form? (a) No (b) Yes
  37. 37.What is the HCF of 18 and 27?
  38. 38.Write 8/28 in its simplest form. =
  39. 39.Write 8/72 in its simplest form. =
  40. 40.Write 4/10 in its simplest form. =

Answer key

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

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