occupancy rate vs pct

occupancy rate and pct both are nouns.

Word	Noun	Adjective	Verb	Adverb
occupancy rate	Yes	No	No	No
pct	Yes	No	No	No

As nouns, pct is a hypernym of occupancy rate; that is, pct is a word with a broader meaning than occupancy rate:

occupancy rate: the percentage of all rental units (as in hotels) are occupied or rented at a given time
pct: a proportion in relation to a whole (which is usually the amount per hundred); ten percent

Other hypernyms of occupancy rate include per centum, percent, percentage.

occupancy rate (noun)	pct (noun)
the percentage of all rental units (as in hotels) are occupied or rented at a given time	a proportion in relation to a whole (which is usually the amount per hundred); ten percent