Answer:
Explanation:
The ratio 4:5 can be like a fraction.
Girls to boys, respectively, is 4:5.
This means for every 4 girls, there are 5 boys.
Now, to get an equivalent fraction you must multiply both the numerator and denominator by the same number.
In this problem, there are 20 girls, which represents the 4 in 4:5.
So we have 4 multiplying by what to get 20?
4x=20, x=5
Now, you must multiply the amount of boys by the same number you multiplied the girls.
5x5=25. There were 25 boys.
4/5=20/x