Final answer:
To calculate the percentage of calories from protein, we multiply the grams of protein by the number of calories per gram of protein and then divide by the total calories per serving. For 5 grams of protein, it is (5g * 4cal/g) / 280cal * 100%, which equals 7% of the total calories from protein.
Step-by-step explanation:
To determine the percentage of calories from protein in a serving of chips, we need to know the number of calories in one gram of protein and then calculate its contribution to the total caloric intake per serving of the chips. There are 4 calories in one gram of protein. So, for 5 grams of protein in a serving, the total number of calories from protein is:
5 grams of protein x 4 calories/gram = 20 calories from protein.
Next, we calculate the percentage of calories from protein:
(Calories from protein / Total calories per serving) x 100% = (20 / 280) x 100% = 7.14%, which when rounded to the nearest whole number is 7%.
The correct answer to the question is therefore d. 7%.