[tex]Solution: \\ \\ \frac{a-8}{-a+8} \\ \\ \frac{a-8}{-(a-8)}\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ |\ factor\ to\ simplify \\ \\ \frac{a-8}{-(a-8)}\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ |\ cancel\ the\ same\ factor \\ \\ \boxed{\frac{1}{-1} = -1} \\ \\ \\ Hope\ it\ Helps =) \\ Domini[/tex]
