rational—a rational.
numerator—an integer.
denominator—a positive integer.
numerator
and denominator
reduce rational
to canonical form and compute the numerator or denominator of that number.
numerator
and denominator
return the numerator
or denominator of the canonical form of rational.
If rational is an integer,
numerator
returns rational
and denominator
returns 1.
(numerator 1/2) → 1 (denominator 12/36) → 3 (numerator -1) → -1 (denominator (/ -33)) → 33 (numerator (/ 8 -6)) → -4 (denominator (/ 8 -6)) → 3
(gcd (numerator x) (denominator x)) → 1