Answer
0.8617
Work Step by Step
From the change of base formula, we know that $log_{b}a=\frac{log_{c}a}{log_{c}b}$ ($a$, $b$, and $c$ are positive real numbers and neither $b$ nor $c$ is equal to 1).
Therefore, $log_{8}6=\frac{log_{10}6}{log_{10}8}=\frac{0.7782}{0.9031}=0.8617$.