To evaluate the expression \( \frac{5}{12} \cdot \sqrt{16} \), we first simplify \( \sqrt{16} \).
\[ \sqrt{16} = 4 \]
Now we can substitute this back into the expression:
\[ \frac{5}{12} \cdot 4 \]
Next, we multiply \( \frac{5}{12} \) by \( 4 \):
\[ \frac{5 \cdot 4}{12} = \frac{20}{12} = \frac{5}{3} \]
The resulting number, \( \frac{5}{3} \), is a rational number. Thus, the correct response is:
Rational, because both numbers are rational.