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Simplest Form Fractions Worksheet

Fractions lesson 8: Simplest form of a fraction · Set 910 · 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 9 and 45?
  2. 2.Is 4/20 in its simplest form? (a) No (b) Yes
  3. 3.What is the HCF of 45 and 72?
  4. 4.Is 18/42 in its simplest form? (a) No (b) Yes
  5. 5.Write 21/56 in its simplest form. =
  6. 6.What is the HCF of 9 and 27?
  7. 7.Is 2/5 in its simplest form? (a) Yes (b) No
  8. 8.Is 3/10 in its simplest form? (a) No (b) Yes
  9. 9.Write 20/45 in its simplest form. =
  10. 10.Write 45/63 in its simplest form. =
  11. 11.What is the HCF of 6 and 42?
  12. 12.Write 5/30 in its simplest form. =
  13. 13.What is the HCF of 24 and 54?
  14. 14.What is the HCF of 18 and 20?
  15. 15.Write 7/28 in its simplest form. =
  16. 16.Write 21/27 in its simplest form. =
  17. 17.Write 24/27 in its simplest form. =
  18. 18.Is 7/8 in its simplest form? (a) Yes (b) No
  19. 19.What is the HCF of 56 and 80?
  20. 20.Write 20/36 in its simplest form. =
  21. 21.Is 15/25 in its simplest form? (a) No (b) Yes
  22. 22.Is 1/4 in its simplest form? (a) Yes (b) No
  23. 23.Write 14/35 in its simplest form. =
  24. 24.Is 15/20 in its simplest form? (a) Yes (b) No
  25. 25.Write 35/40 in its simplest form. =
  26. 26.Write 6/54 in its simplest form. =
  27. 27.Is 4/12 in its simplest form? (a) No (b) Yes
  28. 28.Write 6/9 in its simplest form. =
  29. 29.What is the HCF of 8 and 28?
  30. 30.Write 8/18 in its simplest form. =
  31. 31.Write 24/64 in its simplest form. =
  32. 32.Is 6/21 in its simplest form? (a) Yes (b) No
  33. 33.What is the HCF of 12 and 30?
  34. 34.Write 25/35 in its simplest form. =
  35. 35.What is the HCF of 35 and 63?
  36. 36.Is 1/5 in its simplest form? (a) No (b) Yes
  37. 37.Is 3/5 in its simplest form? (a) Yes (b) No
  38. 38.Write 14/16 in its simplest form. =
  39. 39.Write 28/35 in its simplest form. =
  40. 40.Is 6/10 in its simplest form? (a) Yes (b) No

Answer key

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

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