Convert mixed number to fraction.
$$\dfrac{ 57 }{ 12 }$$ .Simplify $ \dfrac{ 57 }{ 12 } $ by dividing both 57 and 12 by their GCD, which is 3. GCD(57, 12) = 3.
$$ \frac{ 57 }{ 12 } = \frac{ 57 : \color{blue}{ 3 } }{ 12 : \color{blue}{ 3 } } = \frac{ 19 }{ 4 } $$