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is there a generally accepted term for fractions of currency units?
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the coinage act of 1792 of the continental congress established that the lowest money of account for the united states is one-thousandth (1/1000) of a dollar. this sub-unit is the mille (also written mil, mill). other sub-units  given by the act are the disme for one-tenth (1/10) of a dollar (for which, etymologically, is the origin of the word dime), and the cent for one-hundredth (1/100) of a dollar. the ten-thousandth of the dollar value is taken on account by a few financial organizations, but has no official given term. for the monetary value of usd 27.4955, it may be quoted as twenty-seven dollars, forty-nine cents, and five-and-a-half milles.
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