I searched around on the internet for "decimal to fraction conversion" and came across an interesting site that had a piece of java that does it on the fly

That's good, but not what I'm looking for. There is a relatively simple pencil and paper way to do it. I can remember a tiny bit of it... like if I had a 4-digit repeating sequence (like .12341234...) I would start out doing something like writing down 1234/1000 and moving the decimal... oh, hell, I can't remember, just that it was a really neat and totally non-intuitive process.

tanstaafl.