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Simplest Form Fractions Worksheet

Fractions lesson 8: Simplest form of a fraction · Set 101 · 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 6 and 21?
  2. 2.Write 20/35 in its simplest form. =
  3. 3.Is 5/15 in its simplest form? (a) No (b) Yes
  4. 4.What is the HCF of 27 and 30?
  5. 5.Is 4/28 in its simplest form? (a) No (b) Yes
  6. 6.Is 20/45 in its simplest form? (a) No (b) Yes
  7. 7.Write 10/14 in its simplest form. =
  8. 8.Is 4/6 in its simplest form? (a) Yes (b) No
  9. 9.Write 6/60 in its simplest form. =
  10. 10.Write 5/45 in its simplest form. =
  11. 11.Write 9/63 in its simplest form. =
  12. 12.Is 3/4 in its simplest form? (a) Yes (b) No
  13. 13.Write 3/15 in its simplest form. =
  14. 14.What is the HCF of 35 and 42?
  15. 15.Is 6/27 in its simplest form? (a) Yes (b) No
  16. 16.What is the HCF of 42 and 60?
  17. 17.What is the HCF of 20 and 36?
  18. 18.Write 6/15 in its simplest form. =
  19. 19.Write 12/15 in its simplest form. =
  20. 20.What is the HCF of 7 and 63?
  21. 21.Write 6/20 in its simplest form. =
  22. 22.What is the HCF of 42 and 49?
  23. 23.What is the HCF of 15 and 21?
  24. 24.Write 4/14 in its simplest form. =
  25. 25.Write 35/50 in its simplest form. =
  26. 26.Write 18/24 in its simplest form. =
  27. 27.What is the HCF of 21 and 30?
  28. 28.Write 72/81 in its simplest form. =
  29. 29.Write 8/40 in its simplest form. =
  30. 30.Is 2/8 in its simplest form? (a) Yes (b) No
  31. 31.Write 25/30 in its simplest form. =
  32. 32.What is the HCF of 12 and 21?
  33. 33.Write 18/63 in its simplest form. =
  34. 34.What is the HCF of 27 and 90?
  35. 35.Write 42/49 in its simplest form. =
  36. 36.Write 25/35 in its simplest form. =
  37. 37.Write 54/60 in its simplest form. =
  38. 38.Write 15/27 in its simplest form. =
  39. 39.What is the HCF of 3 and 15?
  40. 40.Write 12/42 in its simplest form. =

Answer key

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

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