There are 100 students in class and the ratio of boys to girls is 3:2. How many more boys than girls are there?
The class was divided into 3 + 2 = <T>add(3, 2)=5 parts.
So each part is equal to 100/5 = <T>divide(100, 5)=20.0 students.
Since there are 3 parts for boys, then there are 20 x 3 = <T>multiply(3, 20)=60 boys in class.
So there are 100 - 60 = <T>subtract(100, 60)=40 girls in class.
Hence, there are 60 - 40 = <T>subtract(60, 40)=20 boys more than girls.
