The student body at a high school was surveyed about sports participation. the table below shows the data by grade level. what percentage of the student body are in the 9th grade and dont play a sport? round your answer to the nearest whole number

From the first line of this table you can see that 55 students in the 9th grade don't play a sport. (This is the part number.)

Total amount of  students is 612 (so, the whole number  is 612). 
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nearly 9% of the student body are in the 9th grade and don't play a sport.