Answer:
[tex] {5}^{ - 13} [/tex]
Step-by-step explanation:
[tex] \frac{ {5}^{ - 5} }{ {5}^{8} } = {5}^{ - 5} \div {5}^{8} \\ = {5}^{ - 5 - 8} \\ = {5}^{ - 13} [/tex]
