Rachel weighed her two cats, Tiger and Mittens. Tiger weighed 10.91 pounds, and Mittens weighed 178.08 ounces. Which cat is heavier, and how many pounds heavier is she?

There are 16 ounces in a pound, so Mittens weighs 178.08 ÷ 16 = 11.13 pounds. Compare 11.13 pounds with Tiger’s 10.91 pounds: 11.13 − 10.91 = 0.22 pounds. Mittens is 0.22 pounds heavier than Tiger, which is choice c.

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