Answer:
see below
Step-by-step explanation:
The amount remaining is the difference between what she started with and what she drank:
7/8 -5/6 = amount remaining
The arithmetic can be carried out by expressing each fraction using a denominator of 24, the least common multiple of 6 and 8.
[tex]\dfrac{7\cdot 3}{8\cdot 3}-\dfrac{5\cdot 4}{6\cdot 4} = \boxed{\dfrac{21}{24}-\dfrac{20}{24}=\dfrac{1}{24}}[/tex]
