英语用法之分数连字符何时用?书中a third,two-thirds,three quarters；a quarter,

表示分数
1 分子用基数词,分母用序数词.如 1/3：one-third
2 分子大于1时,分母用复数.如 2/5：two-fifths
3 分子与分母之间的连词符,可有可无.如 “四又六分之一”：four and one sixth.
注：1/2 还可写成a half,1/4 还可写成a / one quarter,3/4 还可写成three quarters.