512 students and teachers attended a play in the auditorium. There were 307 teachers in attendance. What percent of the audience is a teacher? What percent is a student?

Becca wants to mix fruit juice and soda to make a punch. she can buy fruit juice for $3 a gallon and soda for $4 a gallon. if she wants to make 28 gallons of punch at a cost of $3.25 a gallon, how many gallons of fruit juice and how many gallons of soda should she buy?