Find f(x) / g(x)

F(x) = 2 / x

G(x) = 4 / (x + 4)

(2/x) / (4/x+4)

I kind of forgot how to tackle these kinds of problems

Oops nevermind I figured it out. Reciprocal and multiply through. Ok more important question, the result of the problem will be (x + 8) / (2x) . According the back of the book, the domain is x cannot equal 0 and -4. The thing is, clearly -4 can be used in the domain seeing as it will result in -8 in the denominator which is ok. Can someone clear this up?