Answer:
C
Explanation:
To find how much one number (let it be x) is a percentage of another number (let it be y), we can do the following:

We divide the percentage we want (percentage of students) by the total number of students. Then, we multiply that by 100 to convert the decimal into a percentage.
Here, students are 9860
Total population is 62,400
To get the % of students, we divide 9860 by 62,400 and then multiply by 100. Shown below:

Rounding to 1 decimal place, that is 15.8%
Answer choice C is right.