Hi!

If that makes sense, please help me out. If not, let me know and I'll try
and put down more concisely what I want.

Another explanation won't hurt!

(APC<=500 and NOT(ISNA(PassFail)) and PassFail=1)/(PassFail=1 + PassFail=0)

What's this part all about: NOT(ISNA(PassFail))

Biff

"MikeDH" wrote in message
...
I'm still struggling a bit with putting a lot of things in the same
function,
so I'm looking for a little help on the following problem:

Column B contains a lab result value; Column D contains a Pass/Fail value.
I'm trying to calculate a pass/fail percentage for specific ranges of the
lab
result (i.e. APC<=500, 500<APC<=1000). The way I want the formula to run
is

(APC<=500 and NOT(ISNA(PassFail)) and PassFail=1)/(PassFail=1 +
PassFail=0)

If that makes sense, please help me out. If not, let me know and I'll try
and put down more concisely what I want.