So we just started getting into derivatives in class, and I understand the concept and the formulas. I've read through my textbook several times and can't come across a similar problem. I'm sure I'm just overlooking something I know. But the more I stare at this question the angrier I get because it seems so simple. Also, if you could tell me what this 'type' of problem is, I'd appreciate it.

Consider the function h(x), for which h(5) = 2 and h'(5) = 4.

Let f(x) = h(x) / x. Then f'(5) = ?

Thanks in advance.