Fractions
=========

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.  See 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.