#### Answer

Choice$\quad c)$

#### Work Step by Step

Typical percentage problem:
What percent ($n$, as a decimal number) of (the base amount $y)$ is $x?$
Translated:$\quad n\cdot y=x$
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Here, reworded:$\quad$ What percent ($n$, as a decimal number) of $23$ is $57?$
Translated:$\quad n\cdot 23=57$
Choice$\quad c)$