Lizzy: If 60% of the students at school are girls and the number of boys is 300, how many girls are at the school?.
Me: Hmmm, let me think. I think this is the detailed solution:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
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. Final answer: 450.