Perl hash help with parsing apache logs

Hello,
I am reading an apache file and parsing the data.
I need to display number of accesses per hostname, number of accesses, and
a percentage of the total accesses that each host accounted for as follows.

I am having a problem calculating the percentage ot total access.

Thanks in advance

   Hits   %-age    Resource
 -----      -----        -----
     7       1            h10.163.23.98.static.ip.windstream.net
     6       1            ip98-179-8-48.om.om.cox.net
     4       1            ip98-168-193-160.om.om.cox.net
     3       1            ip68-110-22-151.om.om.cox.net
 

#reading in file
my ($file) = @ARGV;
open (LOG, $file);
 
 my ($host,$date,$method,$urls,$httpver,$status,$size,$referrer,$agent);
 
#hash for hits
my %Hits;

while ( my $line=<LOG>) {
   ($host,$date,$method,$urls,$httpver,$status,$size,$referrer,$agent) = $line =~
          m/^(\S+) - - \[(\S+ [\-|\+]\d{4})\] "(\S+) (\S+) ([^"]+)" (\d{3}) (\d+|-) "(.*?)" "([^"]+)"$/;

 #Counting number of hits per host, &Hnames is a subroutine that calls $host and does a reverse dns lookup 
$Hits{&Hnames}++

}
 
 
#------------------------------
       print "=" x 78,"\n";
       print "HOSTNAMES\n";
       print "=" x 78,"\n";
       printf "%6s %4s %s\n", "Hits", "%-age", "Recourse";
       printf "%6s %4s %s\n", "-----", "-----","-----";

# Sorting on hits high -> low
foreach my $key ( sort { $Hits{ $b } <=> $Hits{ $a } } (keys %Hits) ) {
     
        my $num += $Hits{$key};
        my $perc = $Hits{$key}/$num;
      
        printf "%6d %4d %5s\n", $Hits{ $key }, $perc, $key;
    
}

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