Question 198604
Here we go:
{{{(1-2/x)/(1+2/x)}}}
Get rid of the improper fraction first by multiplying top and bottom by x.
{{{x(1-2/x)/x(1+2/x)}}}
{{{(x-2)/(x+2)}}}
All done.

Anymore questions feel free to ask me.
Anthony Allie
arallie@gmail.com
http://arallie.webs.com/tutoring.htm