calc: Fractions
5.2 Fractions
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A “fraction” is a ratio of two integers. Fractions are traditionally
written “2/3” but Calc uses the notation ‘2:3’. (The ‘/’ key performs
RPN division; the following two sequences push the number ‘2:3’ on the
stack: ‘2 : 3 <RET>’, or ‘2 <RET> 3 /’ assuming Fraction mode has been
enabled.) When the Calculator produces a fractional result it always
reduces it to simplest form, which may in fact be an integer.
Fractions may also be entered in a three-part form, where ‘2:3:4’
represents two-and-three-quarters. 
Fraction Formats, for
fraction display formats.
Non-decimal fractions are entered and displayed as ‘RADIX#NUM:DENOM’
(or in the analogous three-part form). The numerator and denominator
always use the same radix.
Info Catalog
calc: Integers
calc: Data Types
calc: Floats