Use reasoning to answer the following question.
If 60% of the students at school are girls and the number of boys is 300, how many girls are at the school?

450
Boys make up 100% - 60% = 40% of the total number of students.

The total number of students at the school is 300 / (40 / 100) = 750 students.

Since 60% of the students are female, there are (60 / 100) * 750 = 450 female students.

.

So, the answer is 450