per,每，-cent,百，百分之一，词源同century,centimeter.引申词义百分比，百分率。

1. 30 percent of reptiles, birds, and fish are currently threatened with extinction.

目前，30%的爬行动物、鸟类和鱼类面临灭绝的危险。

2. The rate of inflation is running at about 2.7 percent.

通货膨胀率大约为2.7%。

3. Last year, economic growth tailed off to below four percent.

去年，经济增长率下降到4%以下。

4. He only got a plurality on November 3rd, just 49 percent.

他在11月3号的选举中仅获得了49%的相对多数票。

5. Almost 80 percent of the state's residents were born elsewhere.

该州居民中几乎有80%出生在异地。