Answer
Choice$\quad b)$
Work Step by Step
Typical percentage problem:
What percent ($n$, as a decimal number) of (the base amount $y)$ is $x?$
Translated:$\quad n\cdot y=x$
---
Here, reworded:$\quad 23\%$ of ($y)$ is $57?$
Translated:$\quad 0.23\cdot y=57$
Choice$\quad b)$