简单的分数
1/2 a/one half
1/3 a/one third
1/4 a/one quarter (北美英语亦作a/one quarter)
3/4 three quarters(北美英语亦作three fourth)
表示强调时用one不用a
复杂的分数
19/56 nineteen over fifty-six
31/144 thirty-one over one four four
带分数
五又三分之二 five and two thirds
参考资料:牛津高阶(第7版)R94页 数字用法(numbers)