Question

You Do The Math: Calculating Energy Contribution of Carbohydrate, Fat, and Protein

Calculate the missing values in the table (Ques. A%, Ques. B% etc.) and then answer the bottom two questions (I and J).

Calories CHO (g) FAT (g) PRO (g) 770 Menu/Food Menu 1/McDonald's Burger Meal Double Quarter Pounder with Cheese French Fries - Large McCafe Chocolate Shake Totals Physiological fuel values 510 910 2190 42 66 136 244 99 9 Proportion (%) 100% Ques. A% Ques. B% 350 120 Menu 2: McDonald's Salad Meal Southwest Grilled Chicken Salad Newman's Own Creamy Southwest Dressing Fruit and Yogurt Parfait Diet Soft Drink Totals Physiological fuel values 150 620 68 4 9 41 Proportion (%) 100% 44% Ques. C% Ques. D% 36 Menu 3: Taco Bell Taco Meal Double Decker Taco Cinnamon Twist Diet Soft Drink Totals Physiological fuel values 320 170 0 490 27 0 0 ml 19 Proportion (%) 100% 51% Ques. E% Ques. F% Menu 4: Taco Bell Salad Meal Fiesta Taco Salad - Steak Caramel Apple Empanada Large Soft Drink Totals Physiological fuel values 730 280 310 1320 75 38 80 193 47 34 4 94 ñ mo Proportion (%) 100% 58% Ques. G% Ques. H% Question I: Which menu is lowest in carbohydrate total grams? Question J: Which menu is lowest in carbohydrate percentage? Menu # Menu #

Answer 1

Percentage of a nutrient in the food = (Total grams of nutrient * physiological value of the nutrient ) / Total value of Calories

Multiply the result by 100 to convert into percentage

Menu 1:

(A %) Percentage of CHO = (244*4) / 2190 = 0.445 = 44.5%

(B%) Percentage of FAT = (99*9) / 2190 = 0.406 = 40.6%

Menu 2:

(C%) Percentage of FAT = (21*9) / 620 = 0.304 = 30%

(D%) Percentage of PRO = (42*4) / 620 = 0.27 = 27%

Menu 3:

(E%) Percentage of FAT = (19*9) / 490 = 0.348 = 0.35 = 35%

(F%) Percentage of PRO = (15*4) / 490 = 0.12 = 12%

Menu 4:

(G%) Percentage of FAT = (47*9) / 1320 = 0.32 = 32%

(H%) Percentage of PRO = (34*4) / 1320 = 0.10 = 10%

Q I (Ans): Menu 3 is lowest in Carbohydrate total grams

63*4 = 252 grams

Q J ( Ans): Menu 2 is lowest in Carbohydrate Percentage

(68*4) / 620 = 0.438 = 0.44 = 44%