Answer:
25%
Explanation:
Although the problem statement doesn't say so, you have to find the total number of people who bought hamburgers. It's 132 + 396, or 528.
132 people out of a total of 528 people ate at Chick-a-Fil. This comes to
132
------- = 0.25, or 25%
528
You must write out your conclusion: "25% of these people ate at Chick-a-Fil.