Piwik\Twig::addFilter_percent PHP Метод

    protected function addFilter_percent()
    {
        $percentage = new Twig_SimpleFilter('percent', function ($string, $precision = 1) {
            $formatter = NumberFormatter::getInstance();
            return $formatter->formatPercent($string, $precision);
        });
        $this->twig->addFilter($percentage);
    }