Hi,
Try this
=sumif($B$2:$B$5,D7,$C$2:$C$5)/sumif($B$2:$B$5,D7,$D$2:$D$5)
D7 has Year 7. I have assumed that the data below is in range B2

5
--
Regards,
Ashish Mathur
Microsoft Excel MVP
www.ashishmathur.com
"Eskercat" <(E-Mail Removed)> wrote in message
news:CFCFD3C2-383C-4821-8B37-(E-Mail Removed)...
> Hi
> I have a column called year group, one called total attendance and one
> called possible total. I would like to create the total % attendance for
> the
> group year 7 by adding up the total attendances and making this a % of the
> possible total:
>
> e.g.
>
> Year 7, 213, 290
> Year 8, 214, 290
> Year 7, 203, 270
> Year 8, 213, 260
>
> So I would like to add only those that relate to year 7, and then create a
> %.
>
> Is this possible?