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An 8-ounce glass of low-fat chocolate milk contains 160 kilocalories (kcal) and 8 grams of protein. What percent of the kcal in the milk comes from protein?

Answer :

Final answer:

Protein provides 4 kilocalories per gram. Multiplying the 8 grams of protein in the milk by 4 kcal/g gives 32 kilocalories from protein. This makes up 20% of the total 160 kilocalories in the milk.

Explanation:

To calculate what percent of the kilocalories in the milk come from protein, we need to know how many kilocalories are provided by the protein. Protein provides 4 kilocalories per gram, so if the milk contains 8 grams of protein, the protein contributes:

8 grams of protein x 4 kcal/g = 32 kilocalories from protein.

Next, we'll find the percentage of the total calories that come from protein:

(32 kilocalories from protein / 160 total kilocalories) x 100 = 20%

Therefore, 20% of the kilocalories in the low-fat chocolate milk come from protein.

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Rewritten by : Barada

Protein has 4 calories per gram. Since this glass of chocolate milk has 8 grams of protein, it has 32 (4*8) calories which originate from protein. Given that the total amount calories contained in this glass are 160, the percentage of calories coming from protein is (100*32)/160 = 20%.