Function rat

rat(n: number, epsilon?: number): { den: number; num: number }
Convert an arbitrary decimal number into a simplified fraction (or ratio). See mixed() for instructions on how to break out the whole number part.
Parameters
- n: number
  The decimal number to convert
- epsilon: number = 1e-6
  Maximum absolute error
Returns { den: number; num: number }
An object containing the fraction's numerator and denominator
Example
```
const frac = SMath.rat(0.625); // { num: 5, den: 8 }
```