高一英语填空2紧急!

问题描述:

高一英语填空2紧急!
今年生产的照相机与去年相比增加了30%. The number of the cameras they produced this year has increased ? 30%?of last year 注释!一个问号代表一个空

by (incraased to是增加到 incraased by是增加了)