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
British currency in the Middle East is said that the British Empire had three currency zones, and that the three currencies were the pound sterling, the dollar, and the rupee. The situation in the British territories of the Middle East was however somewhat complicated, because it involved a situation in which Indian rupees, Turkish piastres, and Egyptian piastres gradually gave way to systems based on units of the sterling system, but without ever involving the introduction of the full sterling coinage. The situation as regards currency in the British territories in the Middle East was quite different from the situation as regards the currencies of the