Salary increase

Ms. Merry's salary increased by 15%, and that was 83 euros. What should pay before the increase?

Correct answer:

x =  553.33 Eur

Step-by-step explanation:

$$\begin{gathered} r=15\mathrm{\%}={\displaystyle \frac{15}{100}}=0.15 \\ r\cdot x=83 \\ 0.15\cdot x=83 \\ 0.15x=83 \\ x={\displaystyle \frac{1660}{3}}\doteq 553.333333=553.33\text{ Eur} \end{gathered}$$

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