NETA Personal Trainer Practice Exam

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How is the percentage of calories derived from carbohydrates calculated?

Grams of carb x 9 kcal/grams / total calories
Grams of carb x 4 kcal/grams / total calories
Grams of carb x 7 kcal/grams / total calories
Grams of carb x 6 kcal/grams / total calories

The correct answer is: Grams of carb x 4 kcal/grams / total calories

The calculation of the percentage of calories derived from carbohydrates is done by first determining the total calories coming from carbohydrates. Since carbohydrates provide 4 kilocalories (kcal) per gram, you multiply the number of grams of carbohydrates consumed by 4. This gives you the total calories from carbohydrates. Next, to find the percentage of total caloric intake that comes from carbohydrates, you divide the total calories from carbohydrates by the total calorie intake and then multiply by 100 to convert it into a percentage. Therefore, using the formula grams of carbohydrate multiplied by 4 kcal/gram, then dividing by total calories appropriately provides the accurate measure of carbohydrate contribution to your overall caloric intake. This understanding is critical for nutrition planning and assessing dietary habits.