Exceptionally good movies (which Paddington 2 is btw) will trend heavily toward 100% and any drop from 100% are from outlier reviewers. Citizen Kane has 1/131 negative reviews and Paddington 2 has 2/253 negative reviews.
If you want a rating of quality you can always just click on the score and see that paddington 2 has an 8.7 aggregate compared to Citizen Kane's 9.9.
* what percent of viewers will not regret watching the movie. That makes this a combination metric of quality and variance. A low variance 7/10 will beat a high variance 8/10 in RT score