Occupancy is the percentage of Available Rooms occupied for a given period of consecutive time.
The occupancy figure (expressed as a percentage) is calculated by dividing the number of rooms occupied for a period by the number of rooms available for the same period.
Other definition:
Occupancy is the percentage of available rooms occupied for a given period. It is
computed by dividing the number of rooms occupied for a period by the number of
rooms available for the same period.
The Travel-Glossary: Everything about Travelling, Sightseeing and the World.