Workkeys Math Practice Test

To determine the amount of flour needed for 75 guests, we start by establishing the ratio of flour to guests based on the provided information. The recipe calls for 9 cups of flour to serve 15 people.

First, we calculate the amount of flour used per person by dividing the total cups of flour by the number of guests it serves:

\[

\text{Flour per person} = \frac{9 \text{ cups}}{15 \text{ people}} = 0.6 \text{ cups per person}

\]

Next, we need to find out how much flour is required for 75 guests. We multiply the flour needed per person by the total number of guests:

\[

\text{Total flour for 75 guests} = 0.6 \text{ cups per person} \times 75 \text{ people}

\]

Calculating this, we have:

\[

0.6 \times 75 = 45 \text{ cups}

\]

Therefore, 45 cups of flour are needed to serve 75 guests. This correct calculation is why the accurate answer to the amount of flour needed is 45 cups.