Question

At a certain high school, 40% of the students are boys and 60% are girls. of the girls, 40% take the bus to school and the rest walk. of the boys, half take the bus to school and half walk. what percent of all students at the high school walk to school?

Answer 1

Let 100% be 10 units

4u --> boys
6u --> girls

60% of 6u walk home. therefore,
$\frac{60}{100} \times 6 = 3 \frac{3}{5}$
50% of 4u walk home. therefore,
$\frac{1}{2} \times 4 = 2$
hence, 2u (boys who walk home) + 3.6u (girls who walk home) = 5.6u

to find percentage,
$\frac{5.6}{10} \times 100 = 55.99999$
rounding up, it'll be 56% of the students