Answer
$f^{-1}(x)=\frac{1}{x}+2$
See graph.
Work Step by Step
Step 1. $f(x)=\frac{1}{x-2} \Longrightarrow y=\frac{1}{x-2} \Longrightarrow x=\frac{1}{y-2} \Longrightarrow y=\frac{1}{x}+2 \Longrightarrow f^{-1}(x)=\frac{1}{x}+2$
Step 2. Check $f(f^{-1}(x))=\frac{1}{(\frac{1}{x}+2)-2}=x$ and $f^{-1}(f(x))=\frac{1}{\frac{1}{x-2}}+2=x$
Step 3. See graph.