Convert mixed number to fraction.
$$\dfrac{ 63 }{ 81 }$$ .Simplify $ \dfrac{ 63 }{ 81 } $ by dividing both 63 and 81 by their GCD, which is 9. GCD(63, 81) = 9.
$$ \frac{ 63 }{ 81 } = \frac{ 63 : \color{blue}{ 9 } }{ 81 : \color{blue}{ 9 } } = \frac{ 7 }{ 9 } $$