The number of the employees has grown from 1 000 to 1 200．This means it has risen ________ 20 percen

The number of the employees has grown from 1 000 to 1 200．This means it has risen ________ 20 percent．

A.by

B.at

C.to

D.with

答案及解析： A

增加百分之几要用介词by。雇员的人数已经从1000增长至1200。