曹老师，我这么断句是否正确?

The proportion of one kind of person or thing in a group is the number of people or things of that kind compared to the total number of people or things in the group.

of one kind of person or thing和in a group 同一层次修饰proportion 

of people or things of that kind 修饰number 

compared to the total number of people or things in the group.整个修饰【number of people or things of that kind】

对吗?