Evaluate
\frac{1}{256}=0.00390625
Factor
\frac{1}{2 ^ {8}} = 0.00390625
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2\times \frac{1}{512}
Calculate \frac{1}{8} to the power of 3 and get \frac{1}{512}.
\frac{2}{512}
Multiply 2 and \frac{1}{512} to get \frac{2}{512}.
\frac{1}{256}
Reduce the fraction \frac{2}{512} to lowest terms by extracting and canceling out 2.
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