I am guessing that your related table that has a record for each sign also has a field that identifies the floor.
Set up a summary report layout based on that table. Use a summary field rather than the count function to count your signs. Add a sub summary layout part "when sorted by" your floor field and put the summary field inside that sub summary layout part.
You must sort your records by the floor field to get the sub summary part to appear.
When I make a summary field of "count by floor" and put it in a sub-summary "when sorted by floor", it gives the count for total number of signs on that floor. How do I divide that by sign type per floor. For example, I need Restrooms 5, Stairs 2, Office 15, but it's saying Restrooms 22.
Add another sub summary sign type "When sorted by" your sign type field.
If you don't want to list the individual records, remove the body layout part and just keep the sub summary parts.
That works, thanks.