Try this in E9:

=SUMPRODUCT(($B$4:$IS$4625)*($B$4:$IS$4<=650),($B $6:$IS$6)*($B$4:$IS
$4))/ SUMPRODUCT(($B$4:$IS$4625)*($B$4:$IS$4<=650),($B$ 4:$IS$4))

Format the cell as a percentage.

Hope this helps.

Pete

On Oct 12, 10:06*pm, Mike wrote:
Not sure if this is possible or not. *Excel 2003. *No VBA experience. *B4:IS4
has daily production output numbers. *I am using a formula like
=COUNTIF($B$4:$IS$4,"625")-COUNTIF($B$4:$IS$4,"650") to find the count of
days where production output was between 626 - 650 pieces and goes in
intervals of 25 up to 1600 in D9:D47. *B6:IS6 has the % of scrap product (B6
is scrap % for pieces shipped in B4...etc). *Is there a way I can average the
scrap % for the output ranges? *For example, I have 5 days where the
production output was between 826 - 850 pieces. *Can I find the scrap % for
those 5 days automatically?
--
Mike