# score.py


class ScoreTracker:
    def __init__(self):
        self.correct = 0
        self.incorrect = 0

    def add_correct(self):
        self.correct += 1

    def add_incorrect(self):
        self.incorrect += 1

    def total(self):
        return self.correct + self.incorrect

    def percentage(self):
        if self.total() == 0:
            return 0
        return (self.correct / self.total()) * 100