Function mixed

mixed(n: number, epsilon?: number): { den: number; num: number; whole: number }
Convert an arbitrary decimal number into a simplified fraction, after breaking out the whole number part first. See rat() for keeping the number as a ratio without separating the whole number part.
Parameters
- n: number
  A decimal number to convert
- epsilon: number = 1e-6
  Maximum absolute error
Returns { den: number; num: number; whole: number }
An object containing the whole part and fraction numerator and denominator
Example
```
const frac = SMath.mixed(-8 / 6); // { whole: -1, num: 1, den: 3 }
```