Generated by SassMeister.com.

SassMeister-input.scss

// ----
// Sass (v3.3.0.rc.1)
// Compass (v0.13.alpha.7)
// ----

$numerator: 5;
$demoninator: 8;
$test: (numerator: 5, denominator: 8);

.debug {
    out: $numerator / $demoninator;
    out: (map-get($test, numerator) / map-get($test, denominator));
}

SassMeister-output.css

.debug {
  out: 0.625;
  out: 5/8;
}