1.分数的表示法
分数由基数词和序数词构成,分子用基数词,分母用序数词,分子超过“1”时,分母用复数,如“十分之一”说成英语是 a[onel tenth,“三分之二”说成英语是 two thirds。
注:“二分之一”通常读作a[one]half,一般不读作a second。另外,“四分之一”可读作 a[one]fourth,也可读作a[one] quarter。也可以是:a quarter
A quarter of all the people surveyed were don't-knows.
参加问卷调查的所有人中有四分之一没有表示明确意见。
A quarter of a million refugees roved around the country.
这个国家有二十五万难民流离失所。
I've got to go in a quarter of an hour
一刻钟以后我就得走了。
A quarter of the working voted for him.
工薪阶层中有1/4的人投票支持他。
He has the backing of almost a quarter of the electorate.
他得到了几乎1/4选民的支持。
A quarter of the residents are over 55 years old.
1/4的居民年龄在55岁以上。
The theatre was about three quarters full.
剧场大约坐了四分之三的人。

2.倍数的表示法
表示倍数时通常借助half, double, twice, three times等之类的词。如:
Half of our money goes on food.
我们有一半的钱花在食物上。
Many things now cost double what they did a few years ago.
许多东西比数年前贵了一倍。
比较以下三句,虽然表达形式不同,但含义相同:
(1)This rope is three times as long as that one.这根绳子是那根的三倍长。
(2)This rope is three times longer than that one.这根绳子是那根的三倍长。
(3)This rope is three times the length of that one. 这根绳子是那根的三倍长。
第(1)向和第(3)白的意思比较清楚,但第(2)包常容易误解,有人认为它与其他两句意思不同,应理解为“这根绳子比那根绳子长三倍”但绝大多数语法学家并不这样认为,而是认为以上三句意思相同。
3.小数的表示法
小数点前的数按普通基数词的读法读,小数点后的数按单个数字一-读出。小数点后的0通常读作oh,有时也读作nought或zero,小数点读作point,如“五点三九”可读作:
five point three nine。
4.百分数的表示法
百分数由基数词(或小数)和百分号(%组成,百分号(%)读作per cent,如“百分之六十”可表示为sixty percent。
65 percent of the 1987 budget went for nuclear weapons research and production.
1987年65%的预算经费被用于核武器的研究和生产。
And ninety percent of children go there.
百分之九十的孩子去那里。
Inflation will be down to three percent
通货膨胀率将降到3%。
Disney will retain a 51 percent controlling interest in the venture.
迪斯尼将保留该项目51%的控股权。
Over ten per cent of the workforce is now idle.
现在有超过百分之十的劳动力闲置。
The increase will not be in excess of two per cent.
增加幅度不会超过百分之二。
House prices rose five per cent last year.
去年房价上涨百分之五。
It is often stated that we use only 10 per cent of our brain.
常有报告称人只运用了大脑的10%。
Women officers make up 13 per cent of the police force
女警占警力的13%。

A career as an actor requires one hundred per cent commitment.
干演员这一行需要百分之百的投入。
He claims a 70 to 80 per cent success rate.
他声称成功率有七到八成。
She has a fifty-fifty chance of winning.
她获胜的可能性是百分之五十。