Answer:
19/6 cups
Explanation:
First, we need to transform the mixed number into a fraction as:
[tex]3\frac{1}{2}=\frac{3\cdot2+1}{2}=\frac{7}{2}[/tex]Now, we need to subtract 1/3 from 7/2, so:
[tex]\frac{7}{2}-\frac{1}{3}=\frac{7\cdot3-2\cdot1}{2\cdot3}=\frac{21-2}{6}=\frac{19}{6}[/tex]Therefore, she needs 19/6 cups more
