To multiply the fractions \(-\frac{1}{3}\) and \(-\frac{5}{8}\), you can follow these steps:
- Multiply the numerators: \(-1 \times -5 = 5\)
- Multiply the denominators: \(3 \times 8 = 24\)
So, the result is:
\[ \frac{5}{24} \]
Therefore, the correct answer is:
5/24