In case you are curious, Natural Numbers are simply the whole numbers: 1, 2, 3, and so on …
No negative numbers and no fractions.
Just as the definition of Natural Numbers can involve anything from two or three words through to pages of technical explanation, some accountants like to baffle you with complexities.
The name Natural Numbers was chosen to indicate the simplicity – plain basic, old-fashioned tax and accounting, explained to you in plain English. If you, the client, do not understand something, the accountant’s job is not done.