Question

after elsa baked muffins, her brother ate 4 of them. he ate $\frac{2}{5}$ of all of the muffins. let $m$ = the number of muffins baked. which equation will solve the problem?
$\bigcirc m-\frac{2}{5}=4$
$\bigcirc m+\frac{2}{5}=4$
$\bigcirc 4m=\frac{2}{5}$
$\bigcirc \frac{2}{5}m=4$

Explanation:

Step1: Define given relationships

Let $m$ = total muffins baked. 4 muffins = $\frac{2}{5}$ of $m$.

Step2: Translate to equation

$\frac{2}{5}$ times total muffins equals 4.
$\frac{2}{5}m = 4$

Answer:

$\frac{2}{5}m = 4$