Yesterday nadia consumed 250 grams of carbohydrate, 75 grams of protein, and 60 grams of fat. 57) what percentage of calories of her day's intake came from fat?

Number of calories gained when eating different types of food differs. Some food types are more fattening relative to other types.
the number of calories consumed when eating carbohydrates -
         - 4 calories/ gram * 250 g  = 1000 calories
calories gained eating proteins - 
         - 4 calories/gram * 75 g  = 300 calories 
calories gained eating fats  
          - 9 calories/ gram * 60 g = 540 calories
total amount of calories consumed = 1000 + 300 + 540 = 1840 calories

percentage of calories coming from fats = 540/1840 *100% = 29.3 %

Than y you put it in    biology