# To get to your school 2/5 of the students walk, 1/3 of the students ride the bus, and the rest come in cars. How many students come to school in cars?

Let $1$ represent all of the students. You can solve this by creating a common denominator for all fractions:
$1 - \frac{2}{5} - \frac{1}{3}$
$\frac{15}{15} - \frac{6}{15} - \frac{5}{15}$
$\frac{15 - 6 - 5}{15}$
$\frac{4}{15}$
$\frac{4}{15}$ of the students come in cars.