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Simplest Form Fractions Worksheet

Fractions lesson 8: Simplest form of a fraction · Set 142 · 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 12 and 20?
  2. 2.Write 3/12 in its simplest form. =
  3. 3.Write 2/18 in its simplest form. =
  4. 4.Is 16/18 in its simplest form? (a) Yes (b) No
  5. 5.Is 21/24 in its simplest form? (a) Yes (b) No
  6. 6.What is the HCF of 28 and 35?
  7. 7.Is 3/30 in its simplest form? (a) No (b) Yes
  8. 8.Write 12/21 in its simplest form. =
  9. 9.Write 6/8 in its simplest form. =
  10. 10.Write 42/49 in its simplest form. =
  11. 11.What is the HCF of 9 and 72?
  12. 12.What is the HCF of 9 and 15?
  13. 13.Is 1/10 in its simplest form? (a) Yes (b) No
  14. 14.Write 12/18 in its simplest form. =
  15. 15.What is the HCF of 12 and 15?
  16. 16.Is 2/5 in its simplest form? (a) No (b) Yes
  17. 17.Is 1/6 in its simplest form? (a) Yes (b) No
  18. 18.Write 28/32 in its simplest form. =
  19. 19.Is 1/2 in its simplest form? (a) Yes (b) No
  20. 20.Is 2/3 in its simplest form? (a) Yes (b) No
  21. 21.Write 12/27 in its simplest form. =
  22. 22.Write 45/72 in its simplest form. =
  23. 23.Write 63/90 in its simplest form. =
  24. 24.What is the HCF of 10 and 18?
  25. 25.Write 5/50 in its simplest form. =
  26. 26.Is 9/30 in its simplest form? (a) Yes (b) No
  27. 27.Is 4/36 in its simplest form? (a) No (b) Yes
  28. 28.What is the HCF of 8 and 72?
  29. 29.What is the HCF of 35 and 45?
  30. 30.Write 4/10 in its simplest form. =
  31. 31.Is 4/5 in its simplest form? (a) No (b) Yes
  32. 32.Write 54/63 in its simplest form. =
  33. 33.What is the HCF of 2 and 6?
  34. 34.Write 24/30 in its simplest form. =
  35. 35.Is 12/14 in its simplest form? (a) Yes (b) No
  36. 36.Write 6/10 in its simplest form. =
  37. 37.Is 9/10 in its simplest form? (a) No (b) Yes
  38. 38.What is the HCF of 18 and 30?
  39. 39.Write 16/56 in its simplest form. =
  40. 40.Is 12/21 in its simplest form? (a) No (b) Yes

Answer key

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

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