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Simplest Form Fractions Worksheet

Fractions lesson 8: Simplest form of a fraction · Set 99 · 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 18 and 20?
  2. 2.Is 2/7 in its simplest form? (a) No (b) Yes
  3. 3.What is the HCF of 4 and 8?
  4. 4.Is 5/7 in its simplest form? (a) Yes (b) No
  5. 5.Write 7/70 in its simplest form. =
  6. 6.Is 2/18 in its simplest form? (a) No (b) Yes
  7. 7.Write 20/36 in its simplest form. =
  8. 8.Is 6/7 in its simplest form? (a) Yes (b) No
  9. 9.Write 8/12 in its simplest form. =
  10. 10.What is the HCF of 63 and 90?
  11. 11.What is the HCF of 9 and 54?
  12. 12.Write 5/50 in its simplest form. =
  13. 13.Write 7/35 in its simplest form. =
  14. 14.Is 10/18 in its simplest form? (a) Yes (b) No
  15. 15.Is 18/21 in its simplest form? (a) No (b) Yes
  16. 16.Write 5/15 in its simplest form. =
  17. 17.Write 27/90 in its simplest form. =
  18. 18.Write 16/40 in its simplest form. =
  19. 19.Is 9/10 in its simplest form? (a) Yes (b) No
  20. 20.What is the HCF of 54 and 63?
  21. 21.Write 30/48 in its simplest form. =
  22. 22.Is 25/45 in its simplest form? (a) Yes (b) No
  23. 23.Is 6/36 in its simplest form? (a) Yes (b) No
  24. 24.Is 4/9 in its simplest form? (a) No (b) Yes
  25. 25.What is the HCF of 4 and 40?
  26. 26.Write 4/14 in its simplest form. =
  27. 27.What is the HCF of 12 and 15?
  28. 28.What is the HCF of 16 and 40?
  29. 29.Is 18/20 in its simplest form? (a) No (b) Yes
  30. 30.What is the HCF of 10 and 14?
  31. 31.What is the HCF of 24 and 80?
  32. 32.Write 6/14 in its simplest form. =
  33. 33.Write 6/48 in its simplest form. =
  34. 34.What is the HCF of 24 and 64?
  35. 35.Is 3/5 in its simplest form? (a) Yes (b) No
  36. 36.Write 12/40 in its simplest form. =
  37. 37.Is 4/12 in its simplest form? (a) No (b) Yes
  38. 38.Is 18/60 in its simplest form? (a) Yes (b) No
  39. 39.Is 5/30 in its simplest form? (a) Yes (b) No
  40. 40.Write 45/54 in its simplest form. =

Answer key

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

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