Simplify (12b^-3)/(a^-4)

$\frac{12 b^{- 3}}{a^{- 4}}$

Move $b^{- 3}$ to the denominator using the negative exponent rule $b^{- n} = \frac{1}{b^{n}}$ .

$\frac{12}{a^{- 4} b^{3}}$

Move $a^{- 4}$ to the numerator using the negative exponent rule $\frac{1}{b^{- n}} = b^{n}$ .

$\frac{12 a^{4}}{b^{3}}$