A recipe for brownies that yields 35 portions requires 2.5 lb of flour. For 200 portions, how many pounds of flour are needed?

To determine the amount of flour required for 200 portions based on a recipe that yields 35 portions, it is necessary to first establish the ratio of flour to portions. The recipe specifies that 2.5 lb of flour makes 35 portions.

To find out how much flour is needed per portion, you can divide the total amount of flour by the number of portions:

2.5 lb of flour / 35 portions = 0.0714 lb of flour per portion.

Now, to calculate the amount of flour needed for 200 portions, you multiply the flour needed per portion by the desired number of portions:

0.0714 lb per portion * 200 portions = 14.2857 lb.

Rounding to a reasonable number of decimal places suggests that approximately 14.3 lb of flour will be needed for 200 portions. This calculation frames the basis for understanding the scaling of recipes, which is essential in dietetic practice for menu planning and food preparation. So, the choice indicating 14.3 lb as the amount of flour required for 200 portions is indeed the correct answer.