Ratio.PartsPerTrillions is wrong

[angularsen]

Values is probably too small to be represented properly.

public static Ratio FromPartsPerTrillions(double partspertrillions)
{
  return new Ratio(0.0 / 1.0 * partspertrillions);
}

public double PartsPerTrillions
{
  get
  {
    return this.DecimalFractions / (0.0 / 1.0);
  }
}