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The common denominator of the two fractions is: 12

$ \frac{23}{12 }= \frac{(1*23)}{(1*12)} =\frac{ 23}{12} $

$ \frac{5}{6 }= \frac{(2*5)}{(2*6)} =\frac{ 10}{12} $

Fractions adjusted to a common denominator

$ \frac{23}{12 }-\frac{ 5}{6 }=\frac{ 23}{12 }-\frac{ 10}{12} $

$ \frac{(23-10)}{12 }=\frac{ 13}{12} $

$ $

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