What is Fraction?

Legal Definition
A part of any thing broken. A combination of numbers, in arithmetic and algebra, representing one or more parts of a unit or integer. Thus, four-fifths is a fraction, formed by dividing a unit into-five equal parts, and taking one part four times. In law, the term fraction is usually applied to the division of a day.

2. In general, there are no fractions in days. Co. Litt. 225 2 Salk. 625; 2 P. A. Browne, 18; II Mass. 204. But in some cases a fraction will be taken into the account, in order to secure a party his rights; 3 Chit. Pr. 111; 8 Ves. 80 4 Campb. R. 197; 2 B. & Ald. 586; Savig. Dr. Rom. ยง182; Rob. Dig. of Engl. Statutes in force in Pennsylvania, 431-2 and when it is required by a special law. Vide article Date.
-- Bouviers Law Dictionary
Legal Definition
A breaking or breaking up; a fragment or broken part; a portion of a thing, less than the whole. Jory v. Palace Dry Goods Co., 30 Or. 196, 46 Pac. 786. See Fraction of a day.
-- Black's Law Dictionary