Mont. Code Ann. § 30-12-106
Fractional parts -- construction of contracts
30-12-106 . Fractional parts -- construction of contracts. Fractional parts of any unit of weight or measure shall mean like fractional parts of the value of such unit as prescribed or defined in 30-12-101 and 30-12-102 , and all contracts concerning the sale of commodities and services shall be construed in accordance with this requirement.