The pharmacy receives the following PN order. What percentage of the total calories are represented by the protein component? (Answer must be numeric; no units or commas; round the final answer to the nearest whole number.)

Item/Quantities:
- Dextrose: 270 g
- Amino acids: 60 g
- Sodium chloride: 38 mEq
- Sodium acetate: 16 mEq
- Potassium: 40 mEq
- Magnesium sulfate: 10 mEq
- Phosphate: 21 mmol
- Calcium: 4.45 mEq
- MVI-12: 5 mL
- Trace elements: 1 mL
- Vitamin K-1: 0.5 mg
- Famotidine: 10 mg
- Regular insulin: 40 units
- Sterile water: qs ad 980 mL

To calculate the percentage of total calories represented by the protein component in the given PN order, we need to determine the total number of calories provided by the protein component and divide it by the total number of calories in the entire PN order. The protein component represents approximately 21% of the total calories in the PN order.

Explanation:

To calculate the percentage of total calories represented by the protein component, we need to determine the total number of calories provided by the protein component and divide it by the total number of calories in the entire PN order.

In the given PN order, we have the following components:

Protein (Amino acids) - 60 grams
Total PN order volume - 980 milliliters

First, we need to convert the protein quantity from grams to calories. Protein provides 4 calories per gram. So, 60 grams of protein would provide 240 calories (60 * 4 = 240).

Next, we need to calculate the total number of calories in the entire PN order. We can do this by summing the calorie contributions from each component:

Dextrose (270 grams) - 270 * 3.4 = 918 calories
Amino acids (60 grams) - 60 * 4 = 240 calories
Sodium chloride (38 mEq) - contributes 0 calories
Sodium acetate (16 mEq) - contributes 0 calories
Potassium (40 mEq) - contributes 0 calories
Magnesium sulfate (10 mEq) - contributes 0 calories
Phosphate (21 mmol) - contributes 0 calories
Calcium (4.45 mEq) - contributes 0 calories
MVI-12 (5 mL) - contributes 0 calories
Trace elements (1 mL) - contributes 0 calories
Vitamin K-1 (0.5 mg) - contributes 0 calories
Famotidine (10 mg) - contributes 0 calories
Regular insulin (40 units) - contributes 0 calories
Sterile water (qs ad 980 mL) - contributes 0 calories

Adding up all the calorie contributions, we get a total of 918 + 240 = 1158 calories.

Now, we can calculate the percentage of calories represented by the protein component:

(240 / 1158) * 100 = 20.7%

Therefore, the protein component represents approximately 21% of the total calories in the PN order.