# At a middle school, 38% of all seventh graders have taken swimming lessons. There are 250 students in the seventh grade. How many of them have taken swimming lessons?

Mar 2, 2017

$95$ students in the seventh grade have taken swimming lessons.

#### Explanation:

We calculate 38% of $250$ using the following formula:

$x = 250 \times \frac{38}{100}$

$x = 25 \cancel{0} \times \frac{38}{10 \cancel{0}} \text{ }$(cancel by 10)

$x = 5 \cancel{25} \times \frac{38}{2 \cancel{10}} \text{ }$(cancel by 5)

$x = 5 \times \frac{19 \cancel{38}}{1 \cancel{2}} \text{ }$(cancel by 2)

$x = 5 \times 19$

$x = 95$