we know that
A mixed number is a combination of a whole number and a fraction
in this problem
\(23\frac{3}{8}\) is a mixed number
\(23\) is a whole number
and
\(\frac{3}{8}\) is a fraction
so
\(23\frac{3}{8}=23+\frac{3}{8} \\ =23+0.375\\ =23.375\)
therefore
the answer is
\(23 \frac{3}{8}\) as a decimal is equal to \(23.375\)