$2 \frac{3}{8}$ as an improper fraction

Step 1 ：Convert the mixed number to an improper fraction by multiplying the whole number by the denominator and adding the numerator: \(2\cdot 8 + 3 = 19\)

Step 2 ：Write the improper fraction as \(\frac{19}{8}\)

Step 3 ：\(\boxed{\frac{19}{8}}\) is the final answer