13/15

The fraction \( \frac{13}{15} \) cannot be simplified further since 13 is a prime number and does not divide 15.

If you need to convert it into a decimal, you can divide 13 by 15:

\[ \frac{13}{15} \approx 0.8667 \]

If you have a specific question or topic related to this fraction (like its use in problems, applications in real life, etc.), let me know!