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
Manx pound Manx pound The Manx pound () is the currency of the Isle of Man, in parity with the pound sterling. The Manx pound is divided into 100 pence. Notes and coins, denominated in pounds and pence, are issued by the Isle of Man Government. The Isle of Man is in a one-sided "de facto" currency union with the United Kingdom: the Manx government has decided to make UK currency legal tender on the island, and to back its own notes and coins with Bank of England notes. Manx government notes may, on demand, be exchanged at par for Bank of