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Simplest Form Fractions Worksheet

Fractions lesson 8: Simplest form of a fraction · Set 271 · 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 7 and 21?
  2. 2.Is 2/7 in its simplest form? (a) Yes (b) No
  3. 3.Write 8/20 in its simplest form. =
  4. 4.What is the HCF of 8 and 16?
  5. 5.What is the HCF of 15 and 21?
  6. 6.Write 12/42 in its simplest form. =
  7. 7.Is 10/14 in its simplest form? (a) No (b) Yes
  8. 8.What is the HCF of 5 and 35?
  9. 9.Is 3/15 in its simplest form? (a) No (b) Yes
  10. 10.Is 3/10 in its simplest form? (a) Yes (b) No
  11. 11.Write 6/27 in its simplest form. =
  12. 12.Is 10/16 in its simplest form? (a) No (b) Yes
  13. 13.What is the HCF of 63 and 90?
  14. 14.Is 4/6 in its simplest form? (a) Yes (b) No
  15. 15.What is the HCF of 18 and 81?
  16. 16.Write 24/56 in its simplest form. =
  17. 17.What is the HCF of 12 and 28?
  18. 18.Write 15/27 in its simplest form. =
  19. 19.Write 18/81 in its simplest form. =
  20. 20.Is 5/8 in its simplest form? (a) Yes (b) No
  21. 21.Is 48/54 in its simplest form? (a) Yes (b) No
  22. 22.Write 5/35 in its simplest form. =
  23. 23.Is 4/7 in its simplest form? (a) No (b) Yes
  24. 24.What is the HCF of 18 and 20?
  25. 25.What is the HCF of 15 and 35?
  26. 26.Write 24/28 in its simplest form. =
  27. 27.What is the HCF of 81 and 90?
  28. 28.Write 3/27 in its simplest form. =
  29. 29.Is 1/5 in its simplest form? (a) No (b) Yes
  30. 30.Write 12/18 in its simplest form. =
  31. 31.Is 14/20 in its simplest form? (a) No (b) Yes
  32. 32.Is 9/12 in its simplest form? (a) Yes (b) No
  33. 33.Write 15/18 in its simplest form. =
  34. 34.Write 9/24 in its simplest form. =
  35. 35.What is the HCF of 21 and 35?
  36. 36.Is 7/8 in its simplest form? (a) Yes (b) No
  37. 37.Write 35/49 in its simplest form. =
  38. 38.Is 4/9 in its simplest form? (a) Yes (b) No
  39. 39.Write 12/40 in its simplest form. =
  40. 40.What is the HCF of 3 and 15?

Answer key

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

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