three-and-one-half percent是百分之几?

three-and-one-half percent是百分之几? one and one-half percent是百分之几 one half of one percent是百分之几? seven and a half percent是百分之多少? 是one and half hours还是one and half hour? fourteen and three tenths percent The W.H.O.says about two and one-half percent die two-tenths of 1 percent 是百分之几, Banks hold one and a half of the three and a half trillion d three quaters of one percent是多少? three-tenths of one percent 是多少啊? half的用法是 one and a half years 还是one and a half year?half具体的用