Looking to calculate the percentage contribution to total energy for carbohydrate, protein and fat in a subject's diet using atwater factors. The participant intakes 8596kj of energy per day, and this consists of 105g of protein, 151g of carbohydrates and 109g of fat.

I have calculated answers of 29.9%, 20.8%, and 46.9%, for carbohydrate, protein and fat respectively but am unsure if I have done it correctly. The percentage contribution to total energy of the macronutrients, protein, carbohydrate and total fat, needs to be determined using the Atwater factors of 17 kJ/gram, 17 kJ/gram, and 37 kJ/gram, respectively.

% Energy =totalenergykJ(gofnutrientAtwaterfactorkJ/g)100