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22 Printer  22.1 The Lisp Printer 22.1.3 Default Print-Object Methods 22.1.3.1 Printing Numbers
22.1.3.1.2 Printing Ratios
Ratios are printed as follows:
the absolute value of the numerator is printed, as for an integer;
then a /; then the denominator. The numerator and denominator are
both printed in the radix specified by the current output base;
they are obtained as if by
numerator and denominator, and so ratios
are printed in reduced form (lowest terms).
If appropriate, a radix specifier can be printed; see
*print-radix*.
If the ratio is negative, a minus sign is printed before the numerator.
For related information about the syntax of a ratio,
see Section 2.3.2.1.2 Syntax of a Ratio.
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