降低百分比英语

the sales volume of current season has been increased 30 percent rispect to the last season90 percent of the products get some problems.this part occupies 80 percent of the entirety。

楼主你好， 英语里面百分比一般是这样表达，XXpercent of XX 希望可以帮到你。

In this quarter the sales has increased / decreased thirty percent than last season.and ninety percent of the products has the quality issuethis part has the eighty percent of all.

This quarter than last quarter sales volume increase/decrease 30% product problems which part occupies the whole 80%就是这样，希望能帮到你～

reduce sth by 30 percent.