$$160\times3\textbackslash\%+200\times8\textbackslash\%=20.8$$ ounces.  $$20.8\div8\textbackslash\%+200=260+200=460$$ ounces. 
Mike has $$160$$ grams of a $$3\textbackslash\%$$ salt solution and Danni has an $$8\textbackslash\%$$ salt solution. If Danni gives $$200$$ grams of her solution to Mike, they will have the same amount of pure salt in their solutions. How many grams of solution did Danni have in the beginning? 
Options:
a: $400$ 
b: $450$ 
c: $460$ 
d: $480$ 