[gen220]

+1 adding my anecdata to this.

If you don’t need irrational numbers (few financial applications do?), the tuple of (value, scale) can take you very far.

[utxaa]

you never really deal with irrationals ... do you mean floating point?

[gen220]

Nope, specifically meant irrationals.

Floating point (up to a certain amount of absurdity) you can describe with integers (value, scale).

Real numbers you can describe with integers (numerator, denominator, scale).

Irrationals are more difficult. That's why we try not to use them :). Hopefully your company's commission tiers are not defined in terms of circles or euclidean distances.