# How do you use the Change of Base Formula and a calculator to evaluate the logarithm log_6 27.5?

$\frac{{\log}_{10} 27.5}{{\log}_{10} 6}$
${\log}_{6} 27.5 = \frac{{\log}_{10} 27.5}{{\log}_{10} 6}$
You can use base $e$ instead of $10$.