If $$1000\textbackslash\%$$ is $$100$$, then $$\left(\frac{1}{10}\right)\text{th}$$ of that, $$10$$, is $$100\textbackslash\%$$ of the number. 
If $$1000\textbackslash\%$$ of a certain number is $$100$$, the certain number is． 
a: $$1$$ 
b: $$10$$ 
c: $$100$$ 
d: $$1000$$ 