percentage vs pct

percentage and pct both are nouns.

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

As nouns, percentage and pct are synonyms defined as:

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

Other synonyms of percentage include per centum, percent.

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