three-fourths 和 three-quarters

都可以的,three-fourths和three-quarters都是名词,四分之三的意思不过是我我就写three-quearters,因为three-fourths多用于数学领域,three-quarters都用于句子里.
参考资料： http://dict.baidu.com/s?wd=three-fourths http://dict.baidu.com/s?wd=three-quarters&tn=dict

Three-quarters

真不知道了，我查字典了，也没查出来。。。答案应该没错吧。

Three-fourths . Three quarters中间不用连字符号。