conversations.from: human
conversations.value: If 60% of the students at school are girls and the number of boys is 300, how many girls are at the school?
conversations.from: assistant
conversations.value: 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.