Convert mixed number to fraction.
$$\dfrac{ 10 }{ 15 }$$ .Simplify $ \dfrac{ 10 }{ 15 } $ by dividing both 10 and 15 by their GCD, which is 5. GCD(10, 15) = 5.
$$ \frac{ 10 }{ 15 } = \frac{ 10 : \color{blue}{ 5 } }{ 15 : \color{blue}{ 5 } } = \frac{ 2 }{ 3 } $$