$\frac{n}{10}=\frac{4}{8}$
\(\boxed{5}\)
Step 1 :Cross-multiply: \(n = 10 \cdot \frac{4}{8}\)
Step 2 :Simplify: \(n = 10 \cdot \frac{1}{2}\)
Step 3 :Calculate: \(n = 5\)
Step 4 :\(\boxed{5}\)