Quick and dirty example follows: 
 perl -e '%events=qw (A 0 B 0 D 12 C 30 D 50); $max=0;$total=0;foreach
+ (keys (%events)){$total += $events{$_};$max=$events{$_} if ($events{
+$_}>$max);}foreach (sort {$events{$b} <=> $events{$a} } keys (%events
+)){$inv_pc=$max*100/$events{$_} if ($events{$_});print "$_ : $inv_pc 
+:", $events{$_}*100/$total,"\n"}'
D : 100 :62.5
C : 166.666666666667 :37.5
A : 166.666666666667 :0
B : 166.666666666667 :0

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In reply to Re: Help with hash by Utilitarian
in thread Help with hash by char09

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