Final answer:
To determine the fractions of girls in a class and students in the library, divide the specific group by the total students. In this scenario, half of the class consists of girls, representing 1/2 of the class, and one-third of the students are in the library, making up 1/3 of the students.
Explanation:
Girls: To find the fraction of girls in the class, you divide the number of girls by the total number of students. If half of the students are girls, then the fraction of girls is 1/2.
Biblioteca: To calculate the fraction of students in the library, you divide the number of students in the library by the total number of students. If one-third of the girls are in the library, that's 1/3 of the students.
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