Language Point 15
One out of every five people on Earth is Chinese,...(Para. 5)
one out of every five: there is one in each five
one out of every ten 每十人中一人
nine out of every ten 每十人中九人
three out of every seven 每七人中三人
one out of ten books 十本書中一本
two out of five hotels 五個旅館中二個
nine out of ten people 十個人中九個