How do you spell 80.40 dollars?

There are a few ways to spell $80.40, depending on the context and desired level of formality:

Formal:

* Eighty dollars and forty cents

* Eighty point four zero dollars (more common in technical contexts)

Informal:

* Eighty dollars and forty

* Eighty forty

* $80.40 (using the dollar sign and decimal)

The most appropriate spelling depends on your audience and purpose. For formal writing, the first two options are recommended. For informal communication, the other options are acceptable.