百分之几用英语怎么说

百分之几用英语怎么说：What percentage/how much percentage.

例句：

1. What percentage of the population speaks English as their first language?

（百分之几的人口以英语为母语？）

2. How much percentage of your income do you save each month?

（你每月存多少百分比的收入？）

3. What percentage of students passed the exam this year?

（今年有多少百分比的学生通过了考试？）