Aclass has 18 girls. Girls make up 60% of the class. How many students are there in the class?
There are several which in which we can approach this question:
We can do this question using direct proportion.
"If 18 girls represent 60%, how many students represent 100%?"
We can make and solve an equation.
Let the number of students be
"60% of the students are 18 girls"
We can increase the number of girls in the ratio
In each case the calculation is the same, but there is a different approach and different reasoning.