“本月我的成绩较上个月下降了百分之二十”"This month I was down twenty percent from the previous month" “本月我的成绩较上个月下降了百分之二十”"This month I was down twenty percent from the previous month"
Drop to sixty percent注：percent 英 [pə'sent] 美 [pɚˈsɛnt] n. 百分比，百分数; 百分之一; adj. 百分之…的，每一百中有…的; 百分之…支付利息的; adv. 以百分之…地，每一百中有…地; [例句]Drunk driving fatalities have declined more than 10 percent over the past 10 years.
