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Simplest Form Fractions Worksheet

Fractions lesson 8: Simplest form of a fraction · Set 72 · 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 8/20 in its simplest form? (a) No (b) Yes
  2. 2.Is 40/45 in its simplest form? (a) No (b) Yes
  3. 3.What is the HCF of 30 and 35?
  4. 4.Write 36/81 in its simplest form. =
  5. 5.Write 10/16 in its simplest form. =
  6. 6.Write 12/21 in its simplest form. =
  7. 7.Is 12/40 in its simplest form? (a) Yes (b) No
  8. 8.Is 1/7 in its simplest form? (a) No (b) Yes
  9. 9.What is the HCF of 21 and 27?
  10. 10.Write 6/9 in its simplest form. =
  11. 11.Is 18/60 in its simplest form? (a) No (b) Yes
  12. 12.Write 3/21 in its simplest form. =
  13. 13.What is the HCF of 21 and 35?
  14. 14.Write 15/21 in its simplest form. =
  15. 15.Write 8/12 in its simplest form. =
  16. 16.Write 10/14 in its simplest form. =
  17. 17.What is the HCF of 6 and 48?
  18. 18.What is the HCF of 18 and 21?
  19. 19.What is the HCF of 8 and 28?
  20. 20.Is 21/24 in its simplest form? (a) No (b) Yes
  21. 21.Write 5/15 in its simplest form. =
  22. 22.Is 3/5 in its simplest form? (a) No (b) Yes
  23. 23.What is the HCF of 3 and 18?
  24. 24.Write 4/20 in its simplest form. =
  25. 25.Is 42/60 in its simplest form? (a) No (b) Yes
  26. 26.Is 7/10 in its simplest form? (a) Yes (b) No
  27. 27.Is 12/16 in its simplest form? (a) Yes (b) No
  28. 28.Write 24/64 in its simplest form. =
  29. 29.Write 14/63 in its simplest form. =
  30. 30.Is 18/48 in its simplest form? (a) No (b) Yes
  31. 31.What is the HCF of 27 and 90?
  32. 32.Is 21/27 in its simplest form? (a) No (b) Yes
  33. 33.What is the HCF of 36 and 45?
  34. 34.Write 2/12 in its simplest form. =
  35. 35.What is the HCF of 16 and 24?
  36. 36.Is 2/9 in its simplest form? (a) Yes (b) No
  37. 37.Is 7/8 in its simplest form? (a) No (b) Yes
  38. 38.Write 7/63 in its simplest form. =
  39. 39.What is the HCF of 9 and 21?
  40. 40.Write 32/36 in its simplest form. =

Answer key

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

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