Classes/Utility/ImageUtility.php
protected static function rationalToDecimal(array $components)
    {
        foreach ($components as $key => $value) {
            $rationalParts = explode('/', $value);
            if (!empty($rationalParts[1])) {
                $components[$key] = $rationalParts[0] / $rationalParts[1];
            } else {
                $components[$key] = 0;
            }
        }
        list($hours, $minutes, $seconds) = $components;

        return $hours + ($minutes / 60) + ($seconds / 3600);
    }
protected static function rationalToDecimal(array $components)
    {
        foreach ($components as $key => $value) {
            $rationalParts = explode('/', $value);
            if (!empty($rationalParts[1])) {
                $components[$key] = $rationalParts[0] / $rationalParts[1];
            } else {
                $components[$key] = 0;
            }
        }
        list($hours, $minutes, $seconds) = $components;

        return $hours + ($minutes / 60) + ($seconds / 3600);
    }
Converts an EXIF rational into its decimal representation.

@param array $components
@return float