Bug on calculating % about alfred-calculate-anything HOT 3 OPEN

/**
 * Construct
 */
public function __construct($query)
{
    $this->query = $query;
    $this->keywords = $this->getKeywords('percentage');
    $this->stop_words = $this->getStopWords('percentage');
    $this->lang = $this->getTranslation('percentage');
    $this->decimal_separator = $this->getSetting('decimal_separator', 'dot');
}


/**
 * shouldProcess
 *
 * @param string $query
 * @param integer $strlenght
 * @return bool
 */
public function shouldProcess(int $strlenght = 0)
{
    $query = trim($this->query);
    if ($strlenght < 3 || !strpos($query, '%')) {
        return false;
    }

    $stopwords = ['+', '-', '%'];
    $stopwords = array_merge($stopwords, $this->stop_words);
    $stopwords = implode('|', $stopwords);
    $stopwords = $this->escapeKeywords($stopwords);
    $stopwords = '(' . $stopwords . ')';

    $keys = $this->keywords;
    foreach ($keys as $k => $value) {
        if (is_array($value)) {
            continue;
        }
        $query = str_replace($k, $value, trim($query));
    }

    $decimalSeparator = $this->decimal_separator === 'dot' ? '.' : ',';
    $regexToCheck = '/^(\d*\\' . $decimalSeparator . '?\d*%?)\s?' . $stopwords . '\s?(\d*\\' . $decimalSeparator . '?\d*%?)/i';
    
    preg_match($regexToCheck, $query, $matches);

    if (empty($matches)) {
        return false;
    }

    $matches = array_filter($matches);
    if (count($matches) < 4) {
        return false;
    }
    $this->parsed = $matches;
    return true;
}

    if (count($data) < 2) {
        return false;
    }
    $percent = $this->cleanupNumber($data[0]);
    $amount = $this->cleanupNumber($data[1]);

    return $this->formatNumber(($percent / 100) * $amount);
}