1/2:a half 表示分数时,分子须用基数词(one ,tuo three例如:3/4three fourths,)分母须用序数词(second,third,fourth)。分子是1以上的任何数,分母须用复数形式(1/3 one third 3/4three fourths)一般不加(写数字)+percent
用阿拉伯数字好吧·····宇宙通用··