The goal is to compare the fractions with the same denominator.
Find the LCD
6 × 2 = 12, 6 × 3 = 18
9 × 2 = 18
LCD = 18
[tex] \frac{5}{6} = \frac{15}{18}
[/tex]
[tex] \frac{7}{9} = \frac{14}{18} [/tex]
Dan has more pocket money remaining, because [tex] \frac{7}{9} [/tex] is smaller than [tex] \frac{5}{6} [/tex].