To add the fractions \( \frac{215}{1} + \frac{13}{1} \), we can combine them since they have the same denominator:
\[ \frac{215}{1} + \frac{13}{1} = \frac{215 + 13}{1} = \frac{228}{1} \]
The simplified form of \( \frac{228}{1} \) is simply 228.
So, \( 215 + 13 = 228 \) expressed as a fraction in simplified form is:
\[ \frac{228}{1} \]
Thus, the final answer is:
\[ \frac{228}{1} \text{ or } 228 \]