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Total calories in a slice of bread
Estimate the total calories in a slice of bread that has 9.0 g of carbohydrates, 2.0 g of protein, and 1.0 g of fat. What percentage of total calories is from fat?

If 4.0kcal/g for proteins and carbohydrates
If 9.0kcal/g for fats

1 kcal = 1 Cal = 1000 cal = 4.18 J

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