Irish pound The number of pence in the Irish pound was redefined from 240 to 100, with the penny symbol changing from "d" to "p". The pound itself was not revalued by this act and therefore pound banknotes were unaffected, although the 10 shilling note was replaced by the 50p coin. The new 5 pence coin correlated with the old 1 shilling coin, and the new 10 pence coin correlated with the old 2 shilling coin. New coins were issued of the same dimensions and materials as the corresponding new British coins. The Decimal Currency Act, 1970 made additional provisions for the
Non-decimal currency accounting, because amounts are written down and calculated using the decimal numeral system (but when another numeral system is used, such as the vigesimal system that was common among ancient Mesoamerican civilizations or the sexagesimal system used by the ancient Mesopotamians, this advantage disappears). However, decimalised currencies also have disadvantages. The principal advantage of most non-decimal currencies is that they are more easily divided, particularly by numbers such as 3 and 8, than decimal currencies. A currency with 100 minor units to the major unit is divisible neither into 3 nor into 8, and furthermore 100 may be an uncomfortably