Question

Sixty percent of a class is girls. If here are 18 girls in a class, then how many total students are there?

Answer 1

30 students

Explanation:

We can do this question using direct proportion.

"If 18 girls represent 60%, how many students represent 100%?"

18/60=x100

x=18×100/60

30 students altogether.

Answer 2

30 students

Step-by-step explanation: If 60% is 18, then 10% wold be 3. And we know that 10% multiplied by 10 is 100%. Therefore 3 multiplied by 10 should be euqal o the total amount of students. And since 10% times 3 is 30, there are 30 students in total.