In mathematics, a percentage is a number or ratio expressed as a score of 100. The percent sign "%" or the abbreviation "PCT" is usually used "PCT" means. Sometimes the abbreviation "PC" is also used. Percentages are dimensionless numbers (pure numbers).

The term "percentage" derives from Latin percentage, which means "percentage". The symbol of "percentage" evolved from the gradual contraction of the Italian term "percentage", which means "one hundred". "Per" is usually abbreviated to "P". Finally, the "center" disappears completely and is reduced to two circles separated by horizontal lines, from which the "%" symbol of the generation is derived.