A unit fraction is a fraction with numerator 1. Examples of unit fractions include 1/2, 1/3, 1/12, and 1/123456. The famous Rhind
papyrus, dated to around 1650 BC, discusses unit fractions and contains a table of
representations of 
as a sum of distinct unit fractions for odd 
between 5 and 101. As a result, sums of unit fractions are
now known as Egyptian fractions.
Unit Fraction
See also
Calcus, Egyptian Fraction, Egyptian Number, Eye of Horus Fraction, Fermat-Catalan Conjecture, Half, Harmonic Number, Pandigital Fraction, Quarter, Scruple, UnciaExplore with Wolfram|Alpha
References
Wells, D. The Penguin Dictionary of Curious and Interesting Numbers. Middlesex, England: Penguin Books, pp. 29 and 31, 1986.Referenced on Wolfram|Alpha
Unit FractionCite this as:
Weisstein, Eric W. "Unit Fraction." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/UnitFraction.html