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Yeah currency will have a whole unit. Common purchases may or may not fall within the range where that unit is the order of magnitude to think of, much in the same way the meter may or may not be the order of magnitude you think of, but it is the 1 marker. Cents are portions of the dollar, yen are whole 1s, even though they’re more or less comparable. Euro-American currencies tend to be subdivided into hundreds, and if needed fractions from there such as the halfpenny.