Question

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."
1. Who is correct? Explain your reasoning. If you
water (cups) oats (cups)
get stuck, consider using the table.
15
6
15
6
6
15

Answer 1

Possible responses

1. Priya and Han are both correct.

2. a. 12.5 cups of water

b. 4 cups of oats

Explanation:

Some students may think that Priya and

Han cannot both be right because they

came up with different numbers. Ask

them to explain what each number

means, so that they have a chance to

notice that the numbers mean different

things. Point out that the positioning of

the number 1 appears in different

columns within the table.