Question

A3 ounce serving of tuna provides 21 grams of protein. Use equivalent ratios to find how many grams of protein are in 9 ounces of tuna

Answer 1

63 grams because 21 x 3 = 63

Answer 2

63 grams of protein in 9 ounces of tuna.

Explanation:

Equivalent ratios are a rule of three problem.

In this problem, we have that:

3 ounce serving of tuna provides 21 grams of protein. To find the equivalent ratio, how many grams of protein are there in one ounce serving of tuna?

3 ounces - 21 grams

1 ounce - x grams

`3x = 21`

`x = 7`

The ratio is 7 grams of protein per ounce, so 7:1.

So in 9 ounces of tuna, there are 9*7 = 63 grams of protein.