12F675 compare voltage help.

[skimask]

I would like to not use those as I want to learn how to do this, but I sure could use some help i'm a bit lost here. Maybe just working on it too long.

The number I expect is 1-3 digits. Example

If the number is 123 it would be 1.23
If its 12 .12
If its just 1 then would be .01

I just can't seem to wrap my mind around how to actually accomplish this.

In post #9 and post #15, you've practically got the answer for yourself.
Cook on it for a bit, roll it around in your brain, see what you come up with.