Okay, according to the graph, there are 55 9th graders under the column
"NO SPORTS"
and there are 612 total people in the school
55 / 612 = the percentage of the student body who is in 9th grade and doesn't play a sport
55 / 612 = 0.0898
8.9% but we need to round
the answer is : about 9% of the students body