percent
This term functions as a precise mathematical descriptor used to standardize proportions across different scales. It carries a neutral, objective connotation and is the standard choice for financial, scientific, and statistical reporting where exactitude is required. While "percentage" refers to the general concept or a specific portion, "percent" is almost always paired with a specific number to denote a precise ratio.
Grammatically, the word is treated as an uncountable noun in most contexts and does not have a plural form. One does not say "five percents" when referring to a value; instead, the singular form remains constant regardless of whether the preceding number is one or one hundred.
Used as a measure of proportion that does not take a plural form even when the number is high.