Answer:
[tex]\frac{3}{8}[/tex] lb.
Step-by-step explanation:
[tex]\frac{1}{2}[/tex] lb of flour is used by Lila to make the bread.
Now, she used [tex]\frac{1}{8}[/tex] lb less flour to make bread than to make cookies.
Then, she used [tex](\frac{1}{2} + \frac{1}{8}) = \frac{5}{8}[/tex] lb flour to make cookies.
Again, she used [tex]\frac{1}{4}[/tex] lb more flour to make cookies than to make brownies.
Therefore, she used [tex](\frac{5}{8} - \frac{1}{4} ) = \frac{3}{8}[/tex] lb flour to make brownies. (Answer)