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.”

Who is correct? Explain your reasoning. If you get stuck, consider using the table.