Final answer:
To calculate the percentage of calories from fat for a serving with 380 kcal and 22 g of fat, first find the calories from fat (22 g × 9 kcal/g = 198 kcal), then divide this by the total calories (198 kcal ÷ 380 kcal) and multiply by 100 to get the percentage (52.11%).
Step-by-step explanation:
To calculate the percentage of calories coming from fat for a food item, you need to know the total calories in a serving and the amount of fat in grams. Each gram of fat contains 9 calories. So, you can calculate the calories from fat using this conversion factor and then find out what percentage of the total calories they represent.
First, calculate the calories from fat:
- Calories from fat = Total fat in grams × Calories per gram of fat
- Calories from fat = 22 g × 9 kcal/g
- Calories from fat = 198 kcal
Next, calculate the percentage of calories from fat:
- Percentage of calories from fat = (Calories from fat ÷ Total calories) × 100
- Percentage of calories from fat = (198 kcal ÷ 380 kcal) × 100
- Percentage of calories from fat = 52.11%