The percentage sign is a common symbol used in mathematics to indicate a certain fraction of a whole. However, there are several synonyms for this symbol that can be used interchangeably. One such synonym is the percent sign, which is simply another way of saying percentage sign. Other synonyms include the symbol "‰", which is known as the per mille sign and represents a fraction of one thousand, and the word "percentile", which is used to describe a value that is a specific percentage of the total population. Regardless of the synonym used, the percentage sign remains an important tool for representing fractions and percentages in mathematics and statistics.