Final answer:
The fraction of the class that are girls who voted for Kylie is determined by multiplying three-fifths by two-thirds, resulting in two-fifths (2/5).
Step-by-step explanation:
To calculate the fraction representing the number of girls in the class who voted for Kylie as class president, we first need to find out what three-fifths of the class is. Next, we will determine what two-thirds of those students represent.
Let's assume there are 'C' students in the class. According to the question, three-fifths of the students voted for Kylie. Therefore, the number of students who voted for Kylie is 3/5 of 'C', which is 3/5 * C.
Out of these students who voted for Kylie, two-thirds were girls, so the number of girls who voted for Kylie can be represented as 2/3 of 3/5 * C. Hence, we multiply the two fractions, resulting in:
(2/3) * (3/5) = 6/15 = 2/5
So, 2/5 of the class consists of girls who voted for Kylie.