src/RpkUtils/Math.php
public static function percentage($value, $from) 
    {
        $value = floatval($value);
        $from = floatval($from);
        return floatval($value/$from*100);
    }
public static function percentage($value, $from) 
    {
        $value = floatval($value);
        $from = floatval($from);
        return floatval($value/$from*100);
    }
Calculate percentage of a value from a total
@param number $value the value for which we want to calc the percent
@param number $total the total from which we want to calc the percent value
@return float