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Simplest Form Fractions Worksheet

Fractions lesson 8: Simplest form of a fraction · Set 570 · 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.Is 2/5 in its simplest form? (a) No (b) Yes
  2. 2.Is 7/8 in its simplest form? (a) Yes (b) No
  3. 3.What is the HCF of 12 and 27?
  4. 4.What is the HCF of 21 and 35?
  5. 5.Is 42/48 in its simplest form? (a) Yes (b) No
  6. 6.Is 9/10 in its simplest form? (a) No (b) Yes
  7. 7.Write 4/14 in its simplest form. =
  8. 8.Is 9/30 in its simplest form? (a) Yes (b) No
  9. 9.Is 5/10 in its simplest form? (a) No (b) Yes
  10. 10.Write 20/24 in its simplest form. =
  11. 11.Is 4/9 in its simplest form? (a) Yes (b) No
  12. 12.Is 12/15 in its simplest form? (a) Yes (b) No
  13. 13.Write 42/48 in its simplest form. =
  14. 14.Is 4/16 in its simplest form? (a) No (b) Yes
  15. 15.Write 32/72 in its simplest form. =
  16. 16.Is 2/18 in its simplest form? (a) No (b) Yes
  17. 17.Write 63/90 in its simplest form. =
  18. 18.What is the HCF of 12 and 42?
  19. 19.Is 3/4 in its simplest form? (a) No (b) Yes
  20. 20.Is 36/40 in its simplest form? (a) No (b) Yes
  21. 21.What is the HCF of 18 and 27?
  22. 22.Write 35/40 in its simplest form. =
  23. 23.Write 15/24 in its simplest form. =
  24. 24.What is the HCF of 9 and 81?
  25. 25.Write 4/36 in its simplest form. =
  26. 26.Is 3/15 in its simplest form? (a) No (b) Yes
  27. 27.What is the HCF of 21 and 70?
  28. 28.Is 4/32 in its simplest form? (a) No (b) Yes
  29. 29.Is 6/48 in its simplest form? (a) No (b) Yes
  30. 30.What is the HCF of 40 and 48?
  31. 31.Is 4/7 in its simplest form? (a) Yes (b) No
  32. 32.Is 2/7 in its simplest form? (a) No (b) Yes
  33. 33.What is the HCF of 25 and 30?
  34. 34.What is the HCF of 5 and 15?
  35. 35.Write 4/6 in its simplest form. =
  36. 36.Is 12/20 in its simplest form? (a) Yes (b) No
  37. 37.Write 72/80 in its simplest form. =
  38. 38.What is the HCF of 15 and 35?
  39. 39.Write 4/28 in its simplest form. =
  40. 40.Write 7/21 in its simplest form. =

Answer key

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

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