Hi all!
I've been struggling with a workflow; I have a table wich contains names and devices:

I need to calculate the share for each device and campaign, like this:

I'm doing it using some Summarize tools and a formula and then joining them, since Camp Name are different, there is no problem to summarize them, but they share the same Devices, so the summarize step group by the total devices, not for campaign and then by device; after the formula the result goes like this:

I'm working with a workflow like this:

It worked in a previous task where the second field was unique.
Any help?
Thanks in advance.