Yes. A negative exponent will flip the number with the exponent to the denominator.
Basically:$${{\mathtt{8}}}^{-{\mathtt{1}}} = {\frac{{\mathtt{1}}}{{\mathtt{8}}}}$$
Another example would be: $${{\mathtt{13}}}^{-{\mathtt{32}}} = {\frac{{\mathtt{1}}}{{{\mathtt{13}}}^{{\mathtt{32}}}}}$$
From there it's simple math with exponents to solve it.
Yes. A negative exponent will flip the number with the exponent to the denominator.
Basically:$${{\mathtt{8}}}^{-{\mathtt{1}}} = {\frac{{\mathtt{1}}}{{\mathtt{8}}}}$$
Another example would be: $${{\mathtt{13}}}^{-{\mathtt{32}}} = {\frac{{\mathtt{1}}}{{{\mathtt{13}}}^{{\mathtt{32}}}}}$$
From there it's simple math with exponents to solve it.