Question

A ratio of boys to girls in a class is 4:5 work out the fraction of boys in the class
work out the fraction of girls in the class

Answer 1

Step-by-step explanation:

$\mathscr{HAPPY BROTHERS DAY}$

$\mathsbf{BOYS=4X AND GIRLS =5X</p><p></p><p>FRACTION OF BOYZ IN CLASS=4X/9X=>4/9</p><p></p><p>SIMILARLY FRACTION OF GIRLS IN CLASS=5/9}$

Answer 2

There is an important difference between the way counts are viewed in ratio to that in fractions.

The ratio of boys : girls

→

4

:

5

so you have 4 boys and 5 girls making the whole count

4

+

5

=

9

in its simplest form.

So to change the ratio proportion into fraction proportion we have:

boys

→

4

9

of the whole.

girls

→

5

9

of the whole.

It is given that the whole is 3321 therefore the count of boys is:

4

9

×

3321

=

1476

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