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Simplest Form Fractions Worksheet

Fractions lesson 8: Simplest form of a fraction · Set 517 · 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 18/21 in its simplest form? (a) No (b) Yes
  2. 2.What is the HCF of 3 and 30?
  3. 3.What is the HCF of 45 and 72?
  4. 4.Write 40/56 in its simplest form. =
  5. 5.Write 14/63 in its simplest form. =
  6. 6.Is 8/12 in its simplest form? (a) No (b) Yes
  7. 7.Write 45/81 in its simplest form. =
  8. 8.Write 9/90 in its simplest form. =
  9. 9.What is the HCF of 4 and 20?
  10. 10.Write 28/32 in its simplest form. =
  11. 11.Is 2/3 in its simplest form? (a) Yes (b) No
  12. 12.What is the HCF of 56 and 80?
  13. 13.Write 2/8 in its simplest form. =
  14. 14.Write 72/80 in its simplest form. =
  15. 15.Is 8/9 in its simplest form? (a) No (b) Yes
  16. 16.Is 1/3 in its simplest form? (a) No (b) Yes
  17. 17.Is 15/27 in its simplest form? (a) No (b) Yes
  18. 18.Is 18/60 in its simplest form? (a) Yes (b) No
  19. 19.Write 4/14 in its simplest form. =
  20. 20.Is 16/20 in its simplest form? (a) Yes (b) No
  21. 21.Is 6/30 in its simplest form? (a) Yes (b) No
  22. 22.Write 27/90 in its simplest form. =
  23. 23.What is the HCF of 10 and 18?
  24. 24.Write 6/12 in its simplest form. =
  25. 25.Is 6/12 in its simplest form? (a) Yes (b) No
  26. 26.Write 10/14 in its simplest form. =
  27. 27.Is 5/8 in its simplest form? (a) No (b) Yes
  28. 28.Write 2/16 in its simplest form. =
  29. 29.Write 15/25 in its simplest form. =
  30. 30.What is the HCF of 42 and 54?
  31. 31.What is the HCF of 18 and 30?
  32. 32.Is 3/10 in its simplest form? (a) Yes (b) No
  33. 33.What is the HCF of 18 and 63?
  34. 34.Write 14/21 in its simplest form. =
  35. 35.Write 63/90 in its simplest form. =
  36. 36.What is the HCF of 24 and 32?
  37. 37.Write 24/30 in its simplest form. =
  38. 38.Is 1/4 in its simplest form? (a) Yes (b) No
  39. 39.What is the HCF of 12 and 21?
  40. 40.What is the HCF of 45 and 50?

Answer key

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

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