The Wayback Machine - http://web.archive.org/web/20200318184226/https://mathworld.wolfram.com/UnitFraction.html
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.
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