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Simplest Form Fractions Worksheet

Fractions lesson 8: Simplest form of a fraction · Set 69 · 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.Write 20/25 in its simplest form. =
  2. 2.Write 81/90 in its simplest form. =
  3. 3.Write 10/15 in its simplest form. =
  4. 4.Write 6/15 in its simplest form. =
  5. 5.Write 5/10 in its simplest form. =
  6. 6.What is the HCF of 12 and 20?
  7. 7.Write 42/54 in its simplest form. =
  8. 8.Write 9/15 in its simplest form. =
  9. 9.What is the HCF of 45 and 81?
  10. 10.Is 2/9 in its simplest form? (a) No (b) Yes
  11. 11.What is the HCF of 15 and 40?
  12. 12.Is 6/7 in its simplest form? (a) No (b) Yes
  13. 13.Write 16/28 in its simplest form. =
  14. 14.Write 15/18 in its simplest form. =
  15. 15.Is 20/28 in its simplest form? (a) No (b) Yes
  16. 16.Is 4/14 in its simplest form? (a) No (b) Yes
  17. 17.Write 63/90 in its simplest form. =
  18. 18.What is the HCF of 6 and 16?
  19. 19.Write 6/20 in its simplest form. =
  20. 20.Is 3/10 in its simplest form? (a) No (b) Yes
  21. 21.What is the HCF of 45 and 54?
  22. 22.What is the HCF of 14 and 18?
  23. 23.Write 40/64 in its simplest form. =
  24. 24.What is the HCF of 9 and 18?
  25. 25.What is the HCF of 36 and 42?
  26. 26.Write 12/20 in its simplest form. =
  27. 27.Is 12/40 in its simplest form? (a) Yes (b) No
  28. 28.What is the HCF of 16 and 18?
  29. 29.Is 8/12 in its simplest form? (a) Yes (b) No
  30. 30.Is 1/10 in its simplest form? (a) Yes (b) No
  31. 31.What is the HCF of 18 and 45?
  32. 32.Is 2/5 in its simplest form? (a) No (b) Yes
  33. 33.Write 4/14 in its simplest form. =
  34. 34.Is 3/8 in its simplest form? (a) No (b) Yes
  35. 35.Write 9/21 in its simplest form. =
  36. 36.What is the HCF of 14 and 20?
  37. 37.Is 9/10 in its simplest form? (a) Yes (b) No
  38. 38.What is the HCF of 18 and 63?
  39. 39.Is 5/20 in its simplest form? (a) Yes (b) No
  40. 40.Is 24/27 in its simplest form? (a) Yes (b) No

Answer key

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

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