pct vs percentage

pct and percentage both are nouns.

Word	Noun	Adjective	Verb	Adverb
pct	Yes	No	No	No
percentage	Yes	No	No	No

As nouns, pct and percentage are synonyms defined as:

pct and percentage: a proportion in relation to a whole (which is usually the amount per hundred); ten percent

Other synonyms of pct include per centum, percent.

pct (noun)	percentage (noun)
a proportion in relation to a whole (which is usually the amount per hundred); ten percent	assets belonging to or due to or contributed by an individual person or group
	a proportion in relation to a whole (which is usually the amount per hundred); ten percent