Multiple (mathematics)
Submultiple

In some texts, " a is a submultiple of b " has the meaning of " a being a unit fraction of b " (a = 1/ b) or, equivalently, " b being an integer multiple n of a " (b = n a). This terminology is also used with units of measurement (for example by the BIPM and NIST), where a unit submultiple is obtained by prefixing the main unit, defined as the quotient of the main unit by an integer, mostly a power of 10. For example, a millimetre is the 1000-fold submultiple of a metre. As another example, one inch may be considered as a 12-fold submultiple of a foot, or a 36-fold submultiple of a yard.
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