# How do you use the properties of logarithms to expand log_10 (y/2)?

${\log}_{10} \left(\frac{y}{2}\right) = {\log}_{10} y - {\log}_{10} 2$
${\log}_{a} x - {\log}_{a} y = {\log}_{a} \left(\frac{x}{y}\right)$
${\log}_{10} \left(\frac{y}{2}\right) = {\log}_{10} y - {\log}_{10} 2$