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Simplest Form Fractions Worksheet

Fractions lesson 8: Simplest form of a fraction · Set 106 · 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 42 and 49?
  2. 2.What is the HCF of 2 and 10?
  3. 3.What is the HCF of 12 and 15?
  4. 4.Is 1/5 in its simplest form? (a) No (b) Yes
  5. 5.Is 16/20 in its simplest form? (a) No (b) Yes
  6. 6.What is the HCF of 18 and 27?
  7. 7.Write 15/21 in its simplest form. =
  8. 8.Write 20/32 in its simplest form. =
  9. 9.Write 8/80 in its simplest form. =
  10. 10.What is the HCF of 9 and 81?
  11. 11.Is 1/10 in its simplest form? (a) Yes (b) No
  12. 12.Write 27/90 in its simplest form. =
  13. 13.Write 15/50 in its simplest form. =
  14. 14.Write 4/16 in its simplest form. =
  15. 15.Is 25/45 in its simplest form? (a) Yes (b) No
  16. 16.Write 49/70 in its simplest form. =
  17. 17.Write 4/40 in its simplest form. =
  18. 18.Is 3/15 in its simplest form? (a) No (b) Yes
  19. 19.Write 18/24 in its simplest form. =
  20. 20.Write 63/72 in its simplest form. =
  21. 21.Write 81/90 in its simplest form. =
  22. 22.Write 28/35 in its simplest form. =
  23. 23.Is 1/6 in its simplest form? (a) Yes (b) No
  24. 24.What is the HCF of 2 and 12?
  25. 25.Is 54/60 in its simplest form? (a) No (b) Yes
  26. 26.Write 18/30 in its simplest form. =
  27. 27.Is 5/6 in its simplest form? (a) Yes (b) No
  28. 28.Write 49/56 in its simplest form. =
  29. 29.What is the HCF of 63 and 72?
  30. 30.Write 15/40 in its simplest form. =
  31. 31.Is 15/35 in its simplest form? (a) Yes (b) No
  32. 32.What is the HCF of 15 and 21?
  33. 33.What is the HCF of 7 and 28?
  34. 34.Write 12/14 in its simplest form. =
  35. 35.Write 63/81 in its simplest form. =
  36. 36.Is 4/7 in its simplest form? (a) No (b) Yes
  37. 37.Write 9/36 in its simplest form. =
  38. 38.Is 4/24 in its simplest form? (a) Yes (b) No
  39. 39.Is 4/9 in its simplest form? (a) No (b) Yes
  40. 40.Write 5/20 in its simplest form. =

Answer key

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

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