Answer:
U = 2
Step-by-step explanation:
[tex] \frac{u}{8} = \frac{3}{12} \\ divide \: \frac{3}{12} \: by \: 3 \\ \frac{u}{8} = \frac{1}{4} \\ multiply \: both \: sides \: by \: 8 \\ \\ u = \frac{1}{4} \times 8 \\ simplify \\ u = \frac{8}{4} \\ divide \: both \: sides \: by \: 4 \\ u = \frac{1}{2} \: or \: 2[/tex]
