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Simplest Form Fractions Worksheet

Fractions lesson 8: Simplest form of a fraction · Set 20 · 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 4/18 in its simplest form. =
  2. 2.Is 4/10 in its simplest form? (a) Yes (b) No
  3. 3.What is the HCF of 16 and 20?
  4. 4.Write 27/63 in its simplest form. =
  5. 5.Is 16/28 in its simplest form? (a) Yes (b) No
  6. 6.Is 3/5 in its simplest form? (a) Yes (b) No
  7. 7.Is 6/24 in its simplest form? (a) No (b) Yes
  8. 8.Write 5/15 in its simplest form. =
  9. 9.What is the HCF of 56 and 64?
  10. 10.Is 2/7 in its simplest form? (a) No (b) Yes
  11. 11.What is the HCF of 64 and 72?
  12. 12.Write 18/21 in its simplest form. =
  13. 13.Write 16/20 in its simplest form. =
  14. 14.What is the HCF of 45 and 50?
  15. 15.Is 12/18 in its simplest form? (a) No (b) Yes
  16. 16.What is the HCF of 12 and 18?
  17. 17.Write 25/30 in its simplest form. =
  18. 18.What is the HCF of 12 and 14?
  19. 19.What is the HCF of 21 and 28?
  20. 20.What is the HCF of 8 and 64?
  21. 21.What is the HCF of 21 and 70?
  22. 22.Write 36/81 in its simplest form. =
  23. 23.Write 21/27 in its simplest form. =
  24. 24.Is 4/5 in its simplest form? (a) Yes (b) No
  25. 25.Is 12/15 in its simplest form? (a) No (b) Yes
  26. 26.Write 9/15 in its simplest form. =
  27. 27.Is 12/30 in its simplest form? (a) No (b) Yes
  28. 28.Write 7/28 in its simplest form. =
  29. 29.Write 9/18 in its simplest form. =
  30. 30.What is the HCF of 15 and 27?
  31. 31.Write 36/63 in its simplest form. =
  32. 32.Is 3/4 in its simplest form? (a) No (b) Yes
  33. 33.What is the HCF of 10 and 35?
  34. 34.Is 15/50 in its simplest form? (a) Yes (b) No
  35. 35.What is the HCF of 9 and 24?
  36. 36.Write 48/56 in its simplest form. =
  37. 37.What is the HCF of 63 and 90?
  38. 38.Write 24/30 in its simplest form. =
  39. 39.Write 6/15 in its simplest form. =
  40. 40.Write 7/63 in its simplest form. =

Answer key

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

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