${5}^{7} \times \frac{ {5}^{-8} }{ {5}^{2} }$
Cancel out the common factor ${5}^{2}$${5}^{5} \times {5}^{-8}$
Calculate the product${5}^{-3}$
Express with a positive exponent using ${a}^{-n}=\frac{ 1 }{ {a}^{n} }$$\frac{ 1 }{ {5}^{3} }$
Evaluate the power$\begin{align*}&\frac{ 1 }{ 125 } \\&\begin{array} { l }0.008,& {5}^{-3}\end{array}\end{align*}$