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Simplest Form Fractions Worksheet

Fractions lesson 8: Simplest form of a fraction · Set 320 · 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 27/45 in its simplest form. =
  2. 2.Write 27/36 in its simplest form. =
  3. 3.Write 6/15 in its simplest form. =
  4. 4.Is 3/9 in its simplest form? (a) Yes (b) No
  5. 5.Write 4/12 in its simplest form. =
  6. 6.Write 20/32 in its simplest form. =
  7. 7.Is 3/8 in its simplest form? (a) No (b) Yes
  8. 8.Is 9/15 in its simplest form? (a) No (b) Yes
  9. 9.Is 1/4 in its simplest form? (a) No (b) Yes
  10. 10.What is the HCF of 7 and 21?
  11. 11.Write 45/81 in its simplest form. =
  12. 12.Write 12/40 in its simplest form. =
  13. 13.Is 1/7 in its simplest form? (a) No (b) Yes
  14. 14.Write 63/72 in its simplest form. =
  15. 15.What is the HCF of 12 and 14?
  16. 16.What is the HCF of 21 and 30?
  17. 17.What is the HCF of 4 and 18?
  18. 18.Write 12/20 in its simplest form. =
  19. 19.What is the HCF of 30 and 36?
  20. 20.Write 72/80 in its simplest form. =
  21. 21.What is the HCF of 63 and 90?
  22. 22.Is 15/50 in its simplest form? (a) Yes (b) No
  23. 23.Is 12/40 in its simplest form? (a) No (b) Yes
  24. 24.What is the HCF of 56 and 80?
  25. 25.Is 4/7 in its simplest form? (a) Yes (b) No
  26. 26.Write 3/27 in its simplest form. =
  27. 27.Write 40/45 in its simplest form. =
  28. 28.Write 72/81 in its simplest form. =
  29. 29.What is the HCF of 2 and 18?
  30. 30.Write 6/18 in its simplest form. =
  31. 31.Write 2/16 in its simplest form. =
  32. 32.What is the HCF of 42 and 48?
  33. 33.What is the HCF of 10 and 25?
  34. 34.Write 12/28 in its simplest form. =
  35. 35.What is the HCF of 12 and 32?
  36. 36.What is the HCF of 21 and 70?
  37. 37.Is 7/8 in its simplest form? (a) No (b) Yes
  38. 38.Write 7/14 in its simplest form. =
  39. 39.What is the HCF of 16 and 36?
  40. 40.Write 9/24 in its simplest form. =

Answer key

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

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