Fractions

what is 5/16 - 1/16

$\begin{array}{rcll} \frac{5}{16} - \frac{1}{16} &=& \frac{5-1}{16} \\ &=& \frac{4}{16} \\ &=& \frac{4}{4\cdot 4} \\ &=& \frac{\not{4}}{\not{4}\cdot 4} \\ &=& \frac{1}{4} \\ \end{array}$

1/4