# What is the formula for data normalized and how applied

How is this formula applied to normalize data? I am reading this paper http://www.ijcte.org/papers/288-L052.pdf

$x'=(x-X_{min})+X_{min}$ ?

then $x'=x$ ?

$$\tilde{x}_i = \frac{x_i - x_{min}}{x_{max} - x_{min}}.$$ This linearly transforms data to fit the interval $[0,1]$. The inverse transformation is clearly
$$x_i = \tilde{x}_i (x_{max} - x_{min}) + x_{min}.$$ The authors seemed to have mixed both formulas in the same expression and you get your result.