David is a football player consuming a high-calorie diet. his daily caloric intake is set at 4,500 kilocalories with the following macronutrient distribution: 45% carbohydrate, 18% fat, and the rest from protein. how many grams of protein is david’s diet providing? (round your answer to the nearest whole number.)

The correct answer is 416.

Explanation:

First you need to know that 4 kilocalories equals 1 gram of protein.

Then you have to do the math:

45% of carbohydrate

18% of fat  

the rest is protein, so:  100% - 45% - 18% = 37%

37% of 4500kcal is 1665 kcal

Then by rule of 3:

1.665 kilocalories x 1 gram / 4 kilocalories = 416,25 grams protein

The nearest hole number is then 416.