Chapter 2 - Equations, Inequalities, and Problem Solving - 2.4 Applications with Percent - 2.4 Exercise Set - Page 109: 48

$225$

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, $ 24\%$ of ($y=?$) is ($x=54$)$?$ Translated:$\quad 0.24\cdot y=54$ ($ 24\%$ converted to decimal notation is $0.24)$ ... divide the last equation with $0.24$ $y=\displaystyle \frac{54}{0.24}=225$