Plz plz plz help me
its for math

65% of students in your school participate in at least one after school activity. if there are 980 students in you school, how many do not participate in an after school activity?

At a kentucky friend chicken, a survey showed 2/3 of all people preferred skinless chicken over the regular chicken. if 2,400 people responded to the survey, how many people preferred regular chicken?

The candy store is having a 30% off sale. emma is going to buy $7.50 worth of candy.how much will she pay after the discount