The fraction 8/5 is raised to the power -1. If a fraction is raised to a negative power, its reciprocal will be having the positive power.
For example in case of [tex] (x)^{-1} [/tex], it can be written as [tex] \frac{1}{x} [/tex]. i.e. to remove the exponent -1 we simply take the reciprocal.
So for given expression the reciprocal will be 5/8
Therefore,
[tex] ( \frac{8}{5} )^{-1}= \frac{5}{8} [/tex]
