Finding a Percent of a Number A 2-column table with 4 rows titled What after school activity do you participate in question mark. Column 1 has entries sport, club, extra help, none. Column 2 has entries 40 percent, 35 percent, 15 percent, 10 percent. The table shows the results of a survey about after-school activities. If 210 students participated in the survey, how many of those students do not participate in any after-school activities? students