Answer:
24%, or 12/50
Explanation:
First, you'll add together all of the total responses to get the 'whole' or total amount of students.
12 + 15 + 17 + 6 = 50
Then, you'll see that out of the 50 students, 12 said horror was their favorite type of movie. So, we write that as 12/50, or 12 students out of the whole or total (50) prefer to watch horror movies. Then, you can divide 12 by 50 to get 0.24, and multiply by 100 to get 24%. (move decimal place 2 times to the right, since 100 = 10^2)