There are $80$ children in a class.  There are $16$ more girls than boys.  What percentage of the class are boys? 
选项为:A:$40\textbackslash\%$  B:$20\textbackslash\%$  C:$10\textbackslash\%$  D:$16\textbackslash\%$  E:$60\textbackslash\%$  请回答其中一个选项.