Answer
$\frac{4}{9}$
Work Step by Step
$\frac{13}{18} - \frac{5}{18}$
The difference of two fractions with same denominators is the difference of their numerators over the common denominator.
$\frac{13-5}{18}$ = $\frac{8}{18}$
Since 2 is the greatest common factor of 8 and 18, divide numerator and denominator by 2
$\frac{4*2}{9*2}$ = $\frac{4}{9}$
