How do you simplify (-15x^16y^2)/(45x^2y^2)?

$\frac{- {x}^{14}}{3}$
$- \frac{15}{45} = - \frac{1}{3}$
${x}^{16} / {x}^{2} = {x}^{16 - 2} = {x}^{14}$
${y}^{2} / {y}^{2} = 1$