Priya, Han, Lin, and Diego are all on a camping trip with their families. The first morning, Priya and Han make oatmeal for the group. The instructions for a large batch say, “Bring 15 cups of water to a boil, and then add 6 cups of oats.” Priya says,

“The ratio of the cups of oats to the cups of water is 6:15. That’s 0.4 cups of oats per cup of water.”

Han says,

“The ratio of the cups of water to the cups of oats is 15:6. That’s 2.5 cups of water per cup of oats.”