To calculate the energy offered from food, multiply the number of grams of protein, carbohydrate, and fat by 4, 4, and 9, respectively. Then add the results together.
Given: 500 grams of carbohydrates, 30 grams of protein, and 75 grams of fat in one day. 500 grams x 4 kcal/g = 2000 kcal 30 grams x 4 kcal/g = 120 kcal 75 grams x 9 kcal/g = 675 kcal = 2795 kcal
From this data, you can calculate the percentage of k calories each of the energy nutrients give to the total. Solution:
2000/2795 * 100% = 72% from carbohydrates 120/2795 * 100% = 4% from protein 675/2795 * 100% = 24% from fat Total: 100%
