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) The 1p coin depicts the left section between the first and third quarter of the shield, representing England and Northern Ireland. The coin's obverse remains largely unchanged, but the beading (the ring of dots around the coin's circumference), which no longer features on the coin's reverse, has also been removed from the obverse. "composition changed to copper-plated steel" 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