In a class there are 20 boys and 25 girls the ratio of girls to the total number of pupils in the class is?

25:45 or 5:9

Step-by-step explanation:

Because you want girls to all pupils, you just put that number against one another, there fore 25:45; but you can simplify it further because you can divide both by 5, therefore 5:9

5: 9

Step-by-step explanation:

The total number of students is

20+25 = 45

ratio is

boys : girls: total

20 : 25: 45

We can divide each of these by 5

20/5 : 25/5: 45/5

4 : 5 : 9

The ratio of girls to the total number is

5: 9