If a salary increase of $7.39\%$ has the value €$4231$, then what is the new salary? > Ryan has been given a salary increase of $7.39\%$. The salary increase is for the value of €$4231$. > > His salary is now $x$. Solve for $x$. My head is saying $$\begin{align} 4231 / 7.39 &= 572 \\\ 572 * 100 &= 57,200 \end{align}$$ is not correct, but I am having a brainfart right now. Can anyone help ? Thanks.

Suppose that Ryan's initial salary is $s$. Then the value of the salary increase is $0.0739s$, so $0.0739s = 4231$, and we get $s = 57253.04$ (watch out for rounding too soon!).

We want to calculate his _final_ salary, which is $$s + 4231.$$

In other words, you forgot to add his increase. (And you also rounded off some fifty-three euros.)