应该是an increasing number of people.形容词increasing 修饰number意思是越来越多的人
例句：
An increasing number of people are choosing not to have children.
越来越多的人选择不要孩子.
An increasing number of people in the country are of mixed race.
该国不同种族混血儿越来越多.
Today an increasing number of people have realized thatlaweducation is of great importance.in order to keep law and order,every one of us is supposed to get a law education.
现在,愈来愈多的人认识到法制教育的重要性.为了维护社会治安,我们每人都应该接受法制教育.
An increasing number of people are joining the "information age" via the internet.
越来越多的人通过互联网进入了“信息时代”.