A survey asked about the number of people who eat breakfast almost every day (B) and the number of people who buy cereal at least once a month (C). The results of the survey are shown in the Venn diagram. Circles B and C overlap. Circle B contains 11, circle C contains 4, and the intersection contains 53. Number 23 is outside of the circles. Given that a randomly chosen person eats breakfast almost everyday, what is the probability that the person also buys cereal at least once a month?