-6 2/3 - 5,75

-6,66-5,75=-12,41

-6 2/3 - 5,75=-6 2/3 - 5 75/100=-6 8/12 - 5 9/12=-11 17/12=-12 5/12

-6 2/3 - 5,75 = -20/3-23/4 = -80/12-69/12 = -149/12 = -12⁵/₁₂