Calculate: sqrt()[ 4 ] /(-81)-16

Expression: $$\sqrt [ 4 ] { \frac { - 81 } { - 16 } }$$

Fraction $\frac{-81}{-16}$ can be simplified to $\frac{81}{16}$ by removing the negative sign from both the numerator and the denominator.

$$\sqrt[4]{\frac{81}{16}}$$

Calculate $\sqrt[4]{\frac{81}{16}}$ and get $\frac{3}{2}$.

$$\frac{3}{2}$$