protected function answer($percent, $text, $feedback)
 {
     $feedback = $this->html_to_text($feedback);
     $text = $this->html_to_text($text);
     $percent = MoodleUtil::round_to_nearest_grade($percent);
     $percent = $percent * 100;
     $result = "%{$percent}%{$text}#{$feedback}";
     return $result;
 }
 protected function get_fraction($item, $interaction, $answer, $default_grade)
 {
     $default_grade = empty($default_grade) ? 1 : $default_grade;
     $score = $this->get_score($item, $interaction, $answer);
     $result = MoodleUtil::round_to_nearest_grade($score / $default_grade);
     return $result;
 }