布伦达有 6 $\ell$ 橙汁。她在早上喝了其中的 $\frac{1}{2}$，并给了她弟弟 $\frac{1}{4}$ $\ell$。最后她还剩多少橙汁？ 答：___ $\ell$

1. Calculate the amount of orange juice Brenda drank.

Amount drank = $\frac{1}{2} \times 6 = 3$ $\ell$

2. Calculate the amount of orange juice left in the end.

Amount left = $6 - 3 - \frac{1}{4} = 3 - \frac{1}{4} = 2\frac{3}{4}$ $\ell$