4 7 of students at a school are boys. If there are 2184 students at the school, how many are girls?

Answer 1

NOTE: It looks like “4 7” is a fraction, 4/7.

1. Calculate the whole as a fraction: 1 = 7/7.
2. Subtract 4/7 from 7/7 to get 3/7.
3. Set up a proportion: 3/7 = x/2168.
4. Cross-multiply to set up an equation.
5. 3 * 2168 = 6552
6. 7 * x = 7x
7. 7x = 6552
8. Divide by 7 on both sides.
9. 7x/7 = x
10. 6552/7 = 936
11. x = 936

Answer: There are 936 girls at the school.