A bag contains $$50$$ straws of two different colours. $$10$$ straws are yellow and the rest are red. What percentage of the straws are red? 
选项为:A:$$10\textbackslash\%$$  B:$$20\textbackslash\%$$  C:$$40\textbackslash\%$$  D:$$80\textbackslash\%$$  请回答其中一个选项.