Ok, here it is.

Column A              Column B

  Date Of Install        On Time?
1     1/05/07                      Y
2     1/05/07                      Y
3     1/05/07                      N
4     1/05/07                      N
5     1/12/07                      Y
6     1/12/07                      N

SO...if you were to do a simple calculation to find the % that were on
time (Or not) for a certain date, you would see that for 1/05/07 there
would be 50% on time and 50% not since there are 4 completed reports
and 2 of yes and 2 of no were submitted. 2 yes divided by 4 total
reports = 50%. With me so far?

Now THAT part has worked so far (With the added detail that the
calculation is on another worksheet so I have to enter in the right
page information into the calculation. But the problem I am running
into is that the calculation is autmotically choosing a random a range
of cells as opposed to restricting itself to those of a certain date.
I need to eventually create a graph of each weeks' data. So the
calculation part saying 50% yes and 50% no is correct because I went
in and manually adjusted the range from say, A1 - A6 (Which is wrong
because A5 and A6 are using the date 1/12 and not 1/05) and I adjusted
it back to A1 - A4.

So what I am trying to do is add a second condition into a COUNTIF
statement saying count these numbers and give me a % but ONLY if it
matches a certain date, this way I dont have to go in and manually
adjust the range for each calculation.

I know I am doing a crappy job of explaining this. It's much easier
when you're looking at the workbook and I explain it face to face.
Hopefully this helps. If not, thanks anyway for trying!