Try this:

Assuming no empty cells within the range.

For the bottom 33%:

=M4<=PERCENTILE($M$2:$M$11,0.33)

For the top 33%:

=M4=PERCENTILE($M$2:$M$11,0.67)


--
Biff
Microsoft Excel MVP


wrote in message
...
Greetings,

I am trying to find a formula to use with Conditional Formatting to
highlight the bottom (and top) 33% of a list of numbers. I have it set
right now where it will highlight the Bottom 4 actual numbers (ie
=M4<=SMALL($M$2:$M$11,4)), but I need it for percent. Example below.
Can anyone help?

In the example below Eric and Ed are the bottom 33% of the scores
(lowest 2 out of 6). I need a form for cond formatting which will
highlisht those two.

John 34
Bill 23
Eric 12
Sally 22
Jane 43
Ed 9