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
Penny (British decimal coin) Penny (British decimal coin) The British decimal one penny (1p) coin, usually simply known as a penny, is a unit of currency equaling one one-hundredth of a pound sterling. The penny’s symbol is p. Its obverse has featured the profile of Queen Elizabeth II since the coin’s introduction on 15 February 1971, the day British currency was decimalised. Four different portraits of the Queen have been used on the coin, with the latest design by Jody Clark being introduced in 2015. The second and current reverse, featuring a segment of the Royal Shield, was introduced in 2008. The correct plural