I'm not quite sure what you're saying you need to do...but getting and sorting the numbers should be simple. Just put both into it's own array, ie:

my (@left, @right) = ();
foreach (@field) {
 m/\(([0-9]+)\/([0-9]+)\)/;
 my $leftnum = $1; my $rightnum = $2;
 push(@left, $leftnum); push(@right, $rightnum);
}
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once you have all the values in seperate arrays - just run the sort function on each.
I think that's what you were trying to say....once they're sorted you can put them back together or do whatever else you wish to do to them.

-Adam Stanley
Nethosters, Inc.