per, per, -cent, hundred, one per cent, 語源は century, centimeter と同じ。
英語の語源
percent
1560s, per cent, from Modern Latin per centum "by the hundred" (see per and hundred). Until early 20c. often treated as an abbreviation and punctuated accordingly.
例文
1. 30 percent of reptiles,birds,and fish are currently threatened with extinction.
現在、爬虫類、鳥類、魚類の30%が絶滅の危険にさらされている。
2.The rate of infration is running at about 2.7 percent .
インフレ率は約2.7%であった。
3.Last year,economic growth tailed off to below four percent .
昨年、経済成長率は4%以下に低下した。
4.He only got a plurality on November 3 rd,just 49 percent .
彼は11月3日の選挙で49%の相対多数票を獲得したにすぎない。/
5.Almost 80 percent of the state 's residents were born elsewhere.