Question 1159650
dislike for adult was 5/20 (25%) and teenagers 7/50 (14%)
this is 12/70 or 17.14% combined.

Adult or teenage moviegoers liked the movie more than disliked, whereas 17% of a group of 70 including both disliked it.  One way. One could simply say 1/4 of adults disliked it and about 1/7 of all teenagers said they did.
The wording is unclear to me because both parts of the reason are saying the same thing.