Part of the "other" is your sleepimage - the size of this file will be the same size as the amount of RAM you have. So if you have anything over 8 GB, the image will be pretty big. You can remove the image (and prevent its creation) with no ill-effects if you want. Its only purpose is to save your system's state right before the battery is completely depleted.
Here is the command to remove the sleep file (it will be created again automatically when your computer is put/goes to sleep):