百分比的作文英语怎么说

① 英语作文中百分比前面可不可以加there are

可以的，例如：
There are about 50% of the students who love swimming.
喜欢游泳的学生大概占百分之五十。

② 英语高考 图表作文里面的百分比或者比例 有几种表达方式呢

50percent
one-tweth

③ 全国的人数百分比英语作文

As is known to us,China has the biggest population in the world,which is more than 1,300,000,000.Such a large population causes some problems in cities,that's the unemployment.Too many people gather in cities and the jobs are not enough.Some graates can't find a job though they have left school for years.In addition,traffic jam is another problem resulting from the big population.There are too many cars on the roads and streets.
The situation of the countryside is not good.Too many people live in the countryside and we don't have enough farm land for them.