Mary consumes approximately 1800 kcalories per day. If she wants to consume 15% of her kcalories from protein, how many grams would that be?

Question

Mary consumes approximately 1800 kcalories per day. If she wants to consume 15% of her kcalories from protein, how many grams would that be?​

Quizplus · Accepted Answer

To calculate the number of grams of protein Mary needs to consume, we follow these steps:
1. Convert Mary's daily energy intake from kcal to kJ: 1800 kcal/day * 4.184 kJ/kcal = 7531 kJ/day
2. Calculate the percentage of kcalories that should come from protein: 15% of 1800 kcal/day = 0.15 * 1800 kcal/day = 270 kcal/day
3. Convert the protein kcal to kJ: 270 kcal/day * 4.184 kJ/kcal = 1131 kJ/day
4. Divide the protein energy by the energy density of protein: 1131 kJ/day ÷ 16.7 kJ/g = 67.8 g/day
Therefore, Mary needs to consume approximately 68 g/day of protein. The closest choice is D) 68 g/day.

Mary Consumes Approximately 1800 Kcalories Per Day