Han and Tyler are following a polenta that uses 5 cups of water for every 2 cups of cornmeal

- Han says "I am using 3 cups of water. I will need 1 1/5 cups of cornmeal."

- Tyler says, " I am using 3 cups of cornmeal. I will need 7 1/2 cups of water."

yes they are using the right ratio

Han and Tyle are using the ratio perfectly.

Step-by-step explanation:

Givens

The ratio is 5 cups of water for every 2 cups of cornmeal (5:2).

Now, Han is using 3 cups of water and will use 1 1/5 cups of cornmeal, which is right, because it's under the ratio 5:2. Basically, the number of cups of water is 2.5 times the number of cups of corn meal, beacuse the given ratio is 5/2=2.5.

If you muliply 1 1/5 x 2.5 = 3. So, Han is right.

On the other hand, Tyler is using 3 cups of cornmeal and he thinks will need 7 1/2 cups of water, which is also true, because the cups of water must be 2.5 tims the cups of cornmeal, and 3 x 2.5 = 7.5 = 7 1/2.

Therefore, Han and Tyle are using the ratio perfectly.