Count percent difference

Hi, Sorry,

I am back on this again, i am confused, so any help would be appreciated.

I must missunderstand how the tablix works, even though i have read about it, so some practical steps would help.

Ok

first image shows my output (i need the % differnce between Overboundry and waitlist count for just my filtered section as a Total and a Line total

I can get a total for both of the columns, but am stuffed when i want to get the percentage.

I misunderstand the structure..any help would be appreciated

My second images shows the design and the script i am using to try to get the percent differnce

Expression:

=Sum(Count(IIF(Fields!OverBound_Flag.Value="Yes",0,Nothing)))/(Sum(Fields!WaitingListId.value))

David