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Simplest Form Fractions Worksheet

Fractions lesson 8: Simplest form of a fraction · Set 280 · 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 18 and 45?
  2. 2.Write 6/9 in its simplest form. =
  3. 3.Is 2/8 in its simplest form? (a) Yes (b) No
  4. 4.Is 24/30 in its simplest form? (a) No (b) Yes
  5. 5.Write 42/48 in its simplest form. =
  6. 6.Write 2/8 in its simplest form. =
  7. 7.What is the HCF of 72 and 80?
  8. 8.Is 6/8 in its simplest form? (a) Yes (b) No
  9. 9.Write 28/40 in its simplest form. =
  10. 10.Write 32/40 in its simplest form. =
  11. 11.What is the HCF of 12 and 27?
  12. 12.What is the HCF of 21 and 35?
  13. 13.Write 54/60 in its simplest form. =
  14. 14.What is the HCF of 12 and 18?
  15. 15.What is the HCF of 8 and 12?
  16. 16.Is 5/15 in its simplest form? (a) Yes (b) No
  17. 17.Is 15/21 in its simplest form? (a) No (b) Yes
  18. 18.Write 12/21 in its simplest form. =
  19. 19.Write 18/63 in its simplest form. =
  20. 20.What is the HCF of 32 and 36?
  21. 21.What is the HCF of 21 and 56?
  22. 22.Is 15/20 in its simplest form? (a) No (b) Yes
  23. 23.Write 81/90 in its simplest form. =
  24. 24.Write 7/56 in its simplest form. =
  25. 25.What is the HCF of 15 and 27?
  26. 26.What is the HCF of 6 and 18?
  27. 27.Write 8/48 in its simplest form. =
  28. 28.Write 8/80 in its simplest form. =
  29. 29.Is 12/40 in its simplest form? (a) No (b) Yes
  30. 30.Write 25/30 in its simplest form. =
  31. 31.Is 6/27 in its simplest form? (a) No (b) Yes
  32. 32.What is the HCF of 6 and 16?
  33. 33.Is 12/42 in its simplest form? (a) No (b) Yes
  34. 34.What is the HCF of 7 and 35?
  35. 35.What is the HCF of 5 and 15?
  36. 36.Is 9/21 in its simplest form? (a) No (b) Yes
  37. 37.Write 7/21 in its simplest form. =
  38. 38.Is 15/18 in its simplest form? (a) No (b) Yes
  39. 39.Write 30/54 in its simplest form. =
  40. 40.What is the HCF of 42 and 54?

Answer key

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

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