what is three to the power of -1 over 4
$$\frac{3^{-1}}{4}=\frac{1*3^{-1}}{4}=\frac{1}{4*3^{+1}}=\frac{1}{4*3}=\frac{1}{12}$$
METHOD:
Any number or letter that is raised to a negative indice is swapped to the other side of the equal sign and the neg is changed to a positive.