EM 12c Illegal division by zero filesystems.pl line 96

I am receiving the Grid Alert error "Illegal division by zero filesystems.pl line 96" from EM12c version 12.1.0.5 OEM and agents and I cannot fine any reference to the exact issue. 

The actual error is:

Illegal division by zero at

$AGENT_HOME/sysman/admin/scripts/filesystems.pl line 96.

em_result=/opt|/dev/hd10opt|1408.00|889.78|518.22|36.81

em_result=/usr|/dev/hd2|3840.00|2806.00|1034.00|26.93

em_result=/|/dev/hd4|1408.00|360.72|1047.28|74.38

Line 96 in the filesystems.pl

else

  {

    $usedkb =
$fields[2];

    $availkb = $fields[3];

    $usedpct =
$fields[4];

    $usedpct =~
s/%//;

     $availpct =
$availkb/($availkb+$usedkb)*100;  <-- This is line 96.

Any assistance would be most helpful.

Thank you!!