$50\textbackslash\% \cdot x = 30\textbackslash\% \cdot y$  $ x = 0.6\cdot y$ 
Suppose $50\textbackslash\%$ of $x$ equals $30\textbackslash\%$ of $y$. What percentage of $y$ is $x$ ? (adapted from 2020 AMC 8, Question 15) 
Options:
  * $$40$$ 
  * $$60$$ 
  * $$80$$ 
  * $120$ 
  * $$200$$ 