Final answer:
The percentage of appellate judges who are Latinos by 2017 is approximately 15%.
Step-by-step explanation:
The question asks about the percentage of appellate judges who are Latinos in 2017. The answer can be found in the information provided. According to the information, in 2021, 8 percent of federal judges are Latinx. Therefore, we can assume that the percentage of appellate judges who are Latinos would be close to this figure. None of the given options match this percentage exactly, but the closest option is option C (15%). Therefore, the answer to the question is option C (15%).