Question

A class contains 13 girls and 15 boys.

What is the ratio of boys to girls?
How many students are there in all?
What fraction of the students are girls?

Answer 1

Given:

Number of girls in class = 13

Number of boys in class = 15

Ratio of boys to girls,

`(Number\:of\:boys)/(Number\:of\:girls)=(15)/(13)`

Ratio = 15 : 13

⇒ Total number of student = 13 + 15 = 28

Fraction of students are girls =
`(13)/(28)`

Answer 2

The ratio is 15:13 (15 boys to 13 girls).

There are 28 students in all

13/28 of the students are girls.

Explanation:

For the ratio, you simply need to put the information on the correct side of the colon [:]. The total amount of students is calculated by adding the numbers together. Finally, the fraction of girls in the class is found by adding the number of girls above the number of total students.