James has $600$ g of a $$8\textbackslash\%$$ salt solution, and then $120$ g of water evaporates. Find the percent concentration of salt solution at this time. 
Overseas Competition->Knowledge Point->Word Problem Modules->Concentration Problems
$$600\times 8\textbackslash\%=48$$ g,  $$600-120=480$$ g,  $$48\div 480\times 100\textbackslash\%=10\textbackslash\%$$. 