# How do you simplify ((3x^4 )/ y)^-3?

${y}^{3} / \left(27 \cdot {x}^{12}\right)$
we have ${\left(\frac{3 \cdot {x}^{4}}{y}\right)}^{- 3} = {\left(\frac{y}{3 \cdot {x}^{4}}\right)}^{3} = {y}^{3} / \left(27 \cdot {x}^{12}\right)$