Question

$45\%$ of the students in a school are boys. If the total number of students in the school is $880$, find the number of girls in the school.

Answer 1

Total number of students in the school $=880$
Number of boys in the school $=45\%\text{of}880$
$=\left(\frac{45}{100}\right)\times 880$
$=\left(\frac{45}{10}\right)\times 88$
$=\left(\frac{9}{2}\right)\times 88$
$=9\times 44$
$==396$
Number of girls in the school = Total number of students - Number of boys
$=880-396=484$
Therefore, there are $484$ girls in the school.