First, let's find one-third of the money that she gives to her mother.
72 / 3 = $24
Second, find one-fourth of the money she spends on going out.
72 / 4 = $18
Fourth, add.
24 + 18 = $42 spent.
Now she has $30 left of the original $72. Put this into a fraction;
30/72 → 5/12
Annabelle has 5/12 ($30) of the money left.
Best of Luck!