$$18\div15\textbackslash\% = 120$$ grams. 
A $$15\textbackslash\%$$ sugar solution contains $$18$$ grams of pure sugar. How many grams of solution are there? 

(1) $$90$$ grams 
(2) $$100$$ grams 
(3) $$120$$ grams 
(4) $$150$$ grams 