Final answer:
To calculate the percentage of calories from protein in a serving, multiply the grams of protein by 4 to get the calories from protein, then divide by the total calories and multiply by 100. For the serving with 10 grams of protein and 380 total calories, approximately 10.53% of the calories come from protein.
Step-by-step explanation:
To calculate the percentage of calories from protein for the given serving, we first need to know how many calories are provided by the protein content. We use the fact that proteins provide 4 Calories per gram. Since the serving contains 10 grams of protein, this equates to:
10 g protein x 4 Calories/g = 40 Calories from protein
Next, we calculate the percentage of the total calories that come from protein:
(Calories from protein / Total calories) x 100 = Percentage of calories from protein
(40 Calories from protein / 380 total Calories) x 100 = 10.53%
Therefore, about 10.53% of the calories in the serving come from protein.