Editing Decimalisation (section)

===Mauritania and Madagascar===
[[Mauritania]] and [[Madagascar]] theoretically retain currencies with units whose values are in the ratio five to one: the [[Mauritanian ouguiya]] (MRU) is equivalent to five [[khoums]], and the [[Malagasy ariary]] (MGA) to five [[iraimbilanja]].

In practice, however, the value of each of these two larger units is very small: as of 2021, the MRU is traded against the [[euro]] at about 44:1, and the MGA at about 4,600:1. In each of these countries, the smaller denomination is no longer used, although in Mauritania there is still a "one-fifth ouguiya" coin.