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Simplest Form Fractions Worksheet

Fractions lesson 8: Simplest form of a fraction · Set 380 · 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 81 and 90?
  2. 2.Is 4/5 in its simplest form? (a) No (b) Yes
  3. 3.What is the HCF of 3 and 12?
  4. 4.Write 27/90 in its simplest form. =
  5. 5.Is 1/2 in its simplest form? (a) Yes (b) No
  6. 6.Is 24/54 in its simplest form? (a) No (b) Yes
  7. 7.Is 7/10 in its simplest form? (a) Yes (b) No
  8. 8.Is 24/28 in its simplest form? (a) No (b) Yes
  9. 9.Write 14/49 in its simplest form. =
  10. 10.Write 20/45 in its simplest form. =
  11. 11.What is the HCF of 6 and 21?
  12. 12.Write 2/18 in its simplest form. =
  13. 13.Is 6/8 in its simplest form? (a) No (b) Yes
  14. 14.Write 45/81 in its simplest form. =
  15. 15.Is 7/9 in its simplest form? (a) No (b) Yes
  16. 16.Write 27/63 in its simplest form. =
  17. 17.Is 15/18 in its simplest form? (a) No (b) Yes
  18. 18.Write 21/27 in its simplest form. =
  19. 19.Write 49/63 in its simplest form. =
  20. 20.Write 18/63 in its simplest form. =
  21. 21.What is the HCF of 24 and 40?
  22. 22.Write 9/63 in its simplest form. =
  23. 23.Is 1/10 in its simplest form? (a) No (b) Yes
  24. 24.Write 14/18 in its simplest form. =
  25. 25.What is the HCF of 6 and 9?
  26. 26.Is 36/42 in its simplest form? (a) No (b) Yes
  27. 27.What is the HCF of 9 and 36?
  28. 28.Is 5/8 in its simplest form? (a) No (b) Yes
  29. 29.Write 7/28 in its simplest form. =
  30. 30.Write 45/63 in its simplest form. =
  31. 31.Write 10/16 in its simplest form. =
  32. 32.What is the HCF of 18 and 20?
  33. 33.Write 8/36 in its simplest form. =
  34. 34.Is 8/28 in its simplest form? (a) No (b) Yes
  35. 35.Is 10/18 in its simplest form? (a) Yes (b) No
  36. 36.Is 2/9 in its simplest form? (a) Yes (b) No
  37. 37.What is the HCF of 48 and 56?
  38. 38.What is the HCF of 12 and 21?
  39. 39.Is 6/27 in its simplest form? (a) Yes (b) No
  40. 40.What is the HCF of 2 and 12?

Answer key

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

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