Regarding this issue, you may want to give the information in the document attached to the user on the explanation of the fields in the Function Room % Occupancy report.
In this case, please kindly let the user know that the %Occupancy for the function room in this report is determined by the meal period.
So in this case, if "Morning" period is set as 7am - 11am in Delphi system for your property, and there is an event for Function Room ABC from 7am - 9am, in this case, the %Occupancy for Morning period for function Room ABC will be 50%, because the event is using 50% (2 hours of 4 hours) of the Morning period.
If the event is from 7am - 11am, in this case, the %Occupancy for Morning period for function room ABC will be 100%. If the event is from 8am - 11am, in this case the % Occupancy will be 75%.