Answer
2 to 1
Work Step by Step
To find the feed to weight gain ratio, first convert the amount of feed to pounds.
$5\ tons\times\frac{2000\ lbs}{1\ ton}=10,000\ lbs$
feed to weight gain = $10000\ to\ 5000=\frac{10000}{5000}=\frac{10000\div5000}{5000\div5000}=\frac{2}{1}$