You will need to install a user script manager extension to install this script.
Simple userscript to allow more precise scores (9.6, 8.5, 7.4 etc.) on MyAnimeList. The userscript enables this by using a separate database to keep track of the decimal scores. (Rounded down numbers will still sent to MAL). This was made due to it being repeatedly, requested aswell as said that it will not be implemented.
At this current point in time, there is no way for those without the script to see these scores without the script. The CSS IDs which this hook onto are only visible to the owner of the list that you are viewing. It should be possible when CSS Selectors Level 4 gets implemented (SEE: http://dev.w3.org/csswg/selectors4/#relational), or if by some miracle, MAL decides to update the list HTML.
Additional tags (Due to GreasyFork lacking an actual tag system): mal myanimelist myanimelist.net anime