If you use the remainder to refer to part of a group, you are referring to the things or people that still remain after the other things or people have already been mentioned or dealt with.
Only 5.9 per cent of the area is now covered in trees. Most of the remainder is farmland.
该地区现在的树木覆盖率仅为5.9%。剩余部分大多是农田。
The remainder of a group are the things or people that still remain after the other things or people have gone or have been dealt with.
He gulped down the remainder of his coffee.
他一口喝完了剩下的咖啡。