At a school event, there were 96 girls. The ratio of the number of girls to the number of boys was 4 : 5. After some time, some boys arrived and the ratio became 2 : 3.
What is the unit rate?
How many boys arrived?
1 - Before the boys arrived, the ratio of girls to boys was: 96 / B = 4/5, solve for B
B = 120 boys.
2 - After few more boys arrived, the ratio of girls to boys: 96 / B = 2 / 3, solve for B
B = 144 boys.
3 - 144 - 120 = 24 boys arrived.
4 - The unit ratio is 96:144 == 1: 1.5
