Answer
$-\frac{2}{3y}$
Work Step by Step
$-\frac{8}{15y}-\frac{2}{15y}$ $\longrightarrow$ subtract numerators
=$\frac{-8-2}{15y}$ $\longrightarrow$ subtracy
=$\frac{-10}{15y}$ $\longrightarrow$ reduce
=$\frac{-10\div5}{15y\div5}$ $\longrightarrow$ divide
=$\frac{-2}{3y}$
