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
Halfpenny (British pre-decimal coin) early reign of Elizabeth II, bearing the inscription in 1953, and thereafter. wikt:ha'porth: Northern British English, from British English "half-penny’s worth", often used in the phrase "daft ha’porth". Halfpenny (British pre-decimal coin) The British pre-decimal halfpenny (d) coin, usually simply known as a halfpenny (pronounced ), historically occasionally also as the obol, was a unit of currency that equalled half of a penny or of a pound sterling. Originally the halfpenny was minted in copper, but after 1860 it was minted in bronze. It ceased to be legal tender in 1969, in the run-up to decimalisation. The halfpenny featured two