Final answer:
To calculate the total calories, one sums the energy provided by proteins, carbohydrates, and fats, using their respective calorie-per-gram values. For a meal with 100g protein, 100g fat, and 400g carbohydrates, the total is 2900 Calories, with 55.17% of calories coming from carbohydrates.
Step-by-step explanation:
The student's questions pertain to the calculation of total calories in a meal and the percentage of calories that come from carbohydrates. To answer these questions, one would need to apply mathematical calculations to nutrition facts.
To find the total calories (energy) of a meal, one would sum up the calories provided by the individual macronutrients. Using the Atwater system, calories are calculated by multiplying the mass of each macronutrient (protein, carbohydrate, and fat) by their respective calorie-per-gram values: proteins and carbohydrates both provide 4 Calories per gram, while fats provide 9 Calories per gram. Assuming the meal contains 100 grams of protein, 100 grams of fat, and 400 grams of carbohydrates, the total caloric intake would be:
- 100g protein x 4 Calories/g = 400 Calories from protein
- 100g fat x 9 Calories/g = 900 Calories from fat
- 400g carbohydrates x 4 Calories/g = 1600 Calories from carbohydrates
Adding these together gives us a total of 2900 Calories for the meal. To calculate the percentage of total calories coming from carbohydrates, we take the calories from carbohydrates and divide by the total calories, then multiply by 100:
(1600 Calories from carbohydrates / 2900 total Calories) x 100 = 55.17%
This means that 55.17% of the total calories in the meal come from carbohydrates. Note that there's an inconsistency in the provided caloric values (3000 vs. 2900 Calories), which may be a typographical error. For the purpose of this calculation, the actual values obtained by the calorie calculations were used (2900 Calories).