Non-decimal currency Non-decimal currency A non-decimal currency is a currency that has sub-units that are a non-decimal fraction of the main unit, i.e. the number of sub-units in a main unit is not a power of 10. Today only two countries in the world use non-decimal currencies. Both of these countries are in Africa. These are Mauritania (1 ouguiya = 5 khoums) and Madagascar (1 ariary = 5 iraimbilanja). However these are only theoretically non-decimal, as in both cases the value of the main unit is so low that the sub-unit is too small to be of any practical use and coins
Pound sterling in the South Atlantic and the Antarctic with sterling, sterling was the currency of much of the Antarctic continent, including the Australian Antarctic Territory and the Ross Dependency. St. Helena used sterling currency as in the United Kingdom until 1976 when it began to issue its own banknotes at par with the pound sterling. In 1984, this territory also began to issue its own coinage, similar to the coinage of the United Kingdom but with different designs on the reverse. The St. Helena currency also circulates on Ascension Island, but not in the other part of the territory, Tristan da Cunha, where UK currency circulates. The Falkland