The calculation above will provide you with "percent answered", which is what you're looking for, it sounds like. I'm assuming you're querying one of the split tables (like dsplit, or hsplit and csplit/psplit for the current/previous info)?. You may want to use the data item CALLSOFFERED in place of ACDCALLS+ABNCALLS, unless you don't want to count items like BUSYCALLS, RINGCALLS, INFLOWCALLS, etc. for example: (sum(ACDCALLS)/CALLSOFFERED)*100
. Or, you may want to remove superfluous parens from your calc: (sum(ACDCALLS)/sum(ACDCALLS+ABNCALLS)) * 100
Again, I don't use designer, so I don't know the particulars that come with it's use. However, one thing to try might be to create a historical split report, and use the calculation there to see if it works, then do the same with a real time report, and see if it's something that only affects integrated reports.
Or perhaps, find an existing standard integrated report that uses the sum function, and check the design to see how the calc is written there?
I know that in old-style custom report writing, the errors aren't always where they appear to be. I assume Designer has Row Searches, or something similar to aggregate and sort data? Might there may be a problem in that area?...sorry I can't be of more direct help, if you've every got a questions with custom report designs in CV Terminal, let me know!
Think I'll sneak in Report Designer in the next upgrade...!