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Simplest Form Fractions Worksheet

Fractions lesson 8: Simplest form of a fraction · Set 90 · 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 21 and 35?
  2. 2.What is the HCF of 16 and 20?
  3. 3.What is the HCF of 18 and 42?
  4. 4.Write 25/45 in its simplest form. =
  5. 5.What is the HCF of 15 and 20?
  6. 6.Is 9/10 in its simplest form? (a) Yes (b) No
  7. 7.What is the HCF of 4 and 10?
  8. 8.What is the HCF of 40 and 64?
  9. 9.Is 24/27 in its simplest form? (a) Yes (b) No
  10. 10.Write 40/48 in its simplest form. =
  11. 11.Write 21/35 in its simplest form. =
  12. 12.Write 6/9 in its simplest form. =
  13. 13.What is the HCF of 4 and 24?
  14. 14.Is 1/6 in its simplest form? (a) Yes (b) No
  15. 15.What is the HCF of 3 and 21?
  16. 16.Is 8/9 in its simplest form? (a) No (b) Yes
  17. 17.Is 5/6 in its simplest form? (a) No (b) Yes
  18. 18.Is 4/20 in its simplest form? (a) No (b) Yes
  19. 19.Write 4/36 in its simplest form. =
  20. 20.Write 18/45 in its simplest form. =
  21. 21.Write 15/24 in its simplest form. =
  22. 22.Is 7/10 in its simplest form? (a) No (b) Yes
  23. 23.Write 28/36 in its simplest form. =
  24. 24.Write 3/27 in its simplest form. =
  25. 25.Is 6/8 in its simplest form? (a) No (b) Yes
  26. 26.Write 4/18 in its simplest form. =
  27. 27.Is 5/8 in its simplest form? (a) Yes (b) No
  28. 28.Is 4/9 in its simplest form? (a) No (b) Yes
  29. 29.Is 4/8 in its simplest form? (a) Yes (b) No
  30. 30.Is 3/4 in its simplest form? (a) Yes (b) No
  31. 31.Is 42/60 in its simplest form? (a) No (b) Yes
  32. 32.Is 6/15 in its simplest form? (a) Yes (b) No
  33. 33.Write 49/56 in its simplest form. =
  34. 34.What is the HCF of 3 and 6?
  35. 35.Is 45/50 in its simplest form? (a) No (b) Yes
  36. 36.Write 8/12 in its simplest form. =
  37. 37.Is 6/60 in its simplest form? (a) No (b) Yes
  38. 38.What is the HCF of 2 and 10?
  39. 39.Is 15/21 in its simplest form? (a) No (b) Yes
  40. 40.What is the HCF of 14 and 49?

Answer key

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

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