30%用英文怎么说怎么写

"30%" in Engpsh can be written as "thirty percent."

The percentage symbol "%" is used to represent a portion of a whole expressed as a number between 0 and 100. It is derived from the Latin word "per centum," which means "per hundred."

Here are some example sentences using "30%":

The price of the product has increased by 30%.
According to the survey, 30% of the respondents said they were satisfied with the service.
My investment portfopo has gained 30% in value over the past year.

In Chinese, these sentences could be translated as:

这个产品的价格上涨了30%。
根据调查，30%的受访者表示他们对这项服务满意。
我的投资组合在过去一年中的价值增长了30%。