They're not "Rotten Tomatoes reviews". They're just
reviews.
All RT is aggregate reviews from media.
That's literally it.
The percentage you see? That's not an average rating or average quality. That is:
Code:
[Number of positive reviews] / [Total Number of Reviews] = Rotten Tomatoes Score
That's all! It's indicative of how many outlets enjoyed the movie (i.e., gave it a positive rating), not its rating. Maybe it can give you an idea of its overall quality, if you judge quality based on critical concensus.
If you want the average score, there's a helpful little "Average Rating" metric.
For example:
BvS
doesn't have an average rating of
32/100.
BvS
does have an average rating of
5.2/10.