protein = 4 calories per gram

Question

carbohydrate = 4 calories per gram
fat = 9 calories per gram

A serving of chicken has 27 grams of protein and 3 grams of fat. How many calories are in a serving of chicken?

Answer 1

The simple answer: There would be 135 calories in a serving of chicken.

Explanation:

Since there are 4 calories in a gram, you multiply the gram by 4 to get that amount of calories. The same concept applies to 27g. All you do is multiply 27 by 4 which gives you 108. Therefore, 27g of protein would have 108 calories.

Next, you multiply 3g of fat by 9, because there are 9 calories in a gram of fat. Thus, 3g of fat would have 27 calories. (3 x 9)

Finally, you just add 27 and 108, which equals to 135.