Because of several measurements based on twelve,such as twelve months in a year, the twelve-hour clock, twelve inches to the foot, twelve pence to the shilling many Western languages have words for base-twelve units such as dozen, gross and great gross, which allow for rudimentary duodecimal nomenclature, such as "two gross six dozen" for 360. Ancient Romans used a decimal system for integers, but switched to duodecimal for fractions, and correspondingly Latin developed a rich vocabulary for duodecimal-based fractions (see Roman numerals). A notable fictional duodecimal system was that of J. R. R. Tolkien's Elvish languages, which used duodecimal as well as decimal.
Because of several measurements based on twelve,such as twelve months in a year, the twelve-hour clock, twelve inches to the foot, twelve pence to the shilling many Western languages .have words for base-twelve units such as dozen gross and great gross, which allow for rudimentary du,odecimal nomenclature, such as "two gross six dozen" for 360. Ancient Romans used a decimal system for integers, but switched to duodecimal for fractions, and correspondingly Latin developed a rich vocabulary for duodecimal-based fractions (see Roman numerals). A notable fictional duodecimal system was that of J. R R. Tolkien's Elvish languages, which used duodecimal as well as decimal.