Answer
$\frac{3}{8}$ lb/gal
Work Step by Step
$\frac{2\frac{1}{4}lb}{6gal}=\frac{\frac{9}{4}lb}{6gal}=\frac{9}{4}\times\frac{1}{6}lb/gal=\frac{/\!\!3\times3}{4}\times\frac{1}{/\!\!3\times2}lb/gal=\frac{3}{8} lb/gal$
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