Answer
$\frac{1}{8}$
Work Step by Step
Step 1: $2^{-3}$
Step 2: According to the negative exponent rule, $2^{-3}=\frac{1}{2^{3}}$.
Step 3: Solving further, $\frac{1}{2^{3}}=\frac{1}{8}$.
Step 4: Therefore, the final answer is $\frac{1}{8}$.
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