$$3/16 \times 9/16+-1/16$$
$\frac{11}{256}=0.04296875$
$$\frac{\frac{3\times 9}{16}}{16}+\frac{-1}{16}$$
$$\frac{\frac{27}{16}}{16}+\frac{-1}{16}$$
$$\frac{27}{16\times 16}+\frac{-1}{16}$$
$$\frac{27}{256}+\frac{-1}{16}$$
$$\frac{27}{256}-\frac{1}{16}$$
$$\frac{27}{256}-\frac{16}{256}$$
$$\frac{27-16}{256}$$
$$\frac{11}{256}$$
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$\frac{11}{2 ^ {8}} = 0.04296875$