Convert the mixed fraction $3\frac{5}{8}$ to an improper fraction.

The correct option is (A).

To convert the mixed fraction into an improper fraction, first multiply the denominator and whole number.

$8\times 3=24$

Now, add the numerator value to the obtained multiplication value.

$24+5=29$

Therefore, the improper fraction is $\frac{29}{8}$.