operator - method
Returns this - subtration
The scale is the largest of the two scales.
Implementation
Fixed operator -(Fixed subtration) {
final targetScale = max(scale, subtration.scale);
final scaledThis =
_rescale(minorUnits, existingScale: scale, targetScale: targetScale);
final scaledSubtraction = _rescale(subtration.minorUnits,
existingScale: subtration.scale, targetScale: targetScale);
return Fixed.fromBigInt(scaledThis - scaledSubtraction, scale: targetScale);
}