#### Answer

$\frac{10}{3}$

#### Work Step by Step

To write $3\frac{1}{3}$ as a mixed number, we must multiply the whole number in front of the fraction and the denominator together.
$3\times3=9$
Next, take the sum of the number above and the numerator.
$9+1=10$
This will be the numerator of the mixed number. We will use the original denominator as the denominator of the mixed number. Therefore, $3\frac{1}{3}=\frac{10}{3}$.