1-5/13=

To solve the expression \( 1 - \frac{5}{13} \), first convert 1 into a fraction with the same denominator:

\[ 1 = \frac{13}{13} \]

Now, subtract \( \frac{5}{13} \) from \( \frac{13}{13} \):

\[ \frac{13}{13} - \frac{5}{13} = \frac{13 - 5}{13} = \frac{8}{13} \]

Therefore, \( 1 - \frac{5}{13} = \frac{8}{13} \).