Question

There are 36 children in a class. 75% of them are boys.

How many are boys? How many are girls?

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Answer 1

Answer:

no. of boys = 27

and girls = 9

Step-by-step explanation:

total children = 36

boys = 75%

girls = 100% - 75% = 25%

so, no. of girls = 25% of total children

= (25/100) x 36

$= \frac{1}{4} \times 36 \\ = 9$

no of boys = total children - no. of girls

= 36-9 = 27

Or

2nd method

total children = 36

boys = 75%

so., no. of boys = 75% of total children

$= \frac{75}{100} \times 36 \\ = \frac{3}{4} \times 36 \\ = 3 \times 9 \\ = 27$

no. of girls = total children - no. of boys

=36 - 27 = 9