[Enhancement] Add the possibility to get the percentage evolution that cancel itself

[lpeyr]

Enhancement

Add the possibility to get the percentage evolution that cancel itself.
For instance, if we have a value that increases by 10%, the following method would return the percentage to get bakc to the original value.

Other informations

Formula

// Base values
double t = 10d/100d;
double m = 1d + t;

// Increase (or decrease)
double v = 100;
double vAfter = m * v;

// Get back
double v2 = (1 / m) * vAfter;