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

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

relating to or denoting a system of numbers and arithmetic based on the number ten, tenth parts, and powers of ten.

step-by-step explanation:

exa:

)

3+11

14

step-by-step explanation:

from this example, we can see that subtracting with integers is the same as adding the opposite. we can solve using a number line or by using the saying "keep, change, change" to us solve. it is important to remember that we can subtract a negative and end up with a larger number than we started with.