I just started calc I and have not had math in 5 yrs. I'm a little rusty. Here's my problem and how far I have gotten. I can't remember what to do next.

f(x)= 1/x

Simplify as much as possible: (f(x+h)-f(x))/h

here's what i did next:

(1/(x+h) - 1/x)/h

This is where I got stuck. Any help would be appreciated!!

Thanks, Missy