How do I fix the 'Division by zero' warning caused by Bigbrother?

[2013-11-24 23:09:28] (ERROR @ /hsphere/local/home/path/mysite.com/core/components/bigbrother/processors/mgr/report/metas.class.php : 72) PHP warning: Division by zero

$progression = round(($value * 100 / $compare) - 100, 1);
                if($progression > 0){
                    $progression = '+ '.$progression;
                    $cls = 'up';
                } elseif($progression < 0){
                    $progression = str_replace('-','- ', $progression);
                    $cls = 'down';
                }

foreach($this->ga->report['totalsForAllResults'] as $key => $v){
            if( isset( $this->results[$key] ) ){
                $cls = '';
                $value = $this->results[$key]['value'];
                $compare = intval( $v );
                $progression = round(($value * 100 / $compare) - 100, 1);

foreach($this->ga->report['totalsForAllResults'] as $key => $v){
    if( isset( $this->results[$key] ) ){
        $cls = '';
        $value = $this->results[$key]['value'];
        $compare = intval( $v );
        if ($compare != 0) {
            $progression = round(($value * 100 / $compare) - 100, 1);
        }

foreach($this->ga->report['totalsForAllResults'] as $key => $v){
    if( isset( $this->results[$key] ) ){
        $cls = '';
        $value = $this->results[$key]['value'];
        $compare = intval( $v );
        $compare = ($compare == 0) ? .01 : $compare;
        $progression = round(($value * 100 / $compare) - 100, 1);