Calculating the Amount of Pork Roast Needed for 600 Portions

Explanation:

Calculating Total Amount Needed: To begin, we know that each portion weighs 3 oz and there are 600 portions needed. Therefore, the total weight required is 1800 oz (3 oz * 600).

Converting to Pounds: Since 1 lb equals 16 oz, we convert the total amount to pounds which gives us 112.5 lbs (1800 oz / 16).

Adjusting for Shrinkage: To accommodate the 15% shrinkage factor during cooking, we divide the desired amount by 0.85 (100% - 15% = 85% or 0.85 in decimal form). This results in a total raw weight requirement of approximately 132.35 lbs.

Final Answer Selection: Among the answer choices provided, the closest amount to the calculated raw weight after shrinkage is 133 lbs, which is option c.

For further understanding on how to calculate weights, you can explore more here.