A particular food

Question

A particular food contains only fat, carbohydrates, and protein and has a total of 388 calories. If 40% of the total calories comes carbohydrates and 25% of the total calories comes from protein, how many grams of carbs, protein, and fat are present in this food item?

Answer 1

Carbohydrates provide 4 calories per gram, protein provides 4 calories per gram, and fat provides 9 calories per gram.

100 – 40 – 25 = 35% fat

0.40 x 388 = 155 calories from carbohydrates (1 g carbohydrate / 4 calories) = 39 g carbohydrate

0.25 x 388 = 97 calories from protein (1 g protein / 4 calories) = 24 g protein

0.35 x 388 = 136 calories from fat (1 g fat / 9 calories) = 15 g fat