Why does an account balance less than -40 dollars represents a debt greater than 40 dollars?

An account balance less than -40 dollars represents a debt greater than 40 dollars because negative numbers represent amounts owed or deficits. In this case, a balance of -40 dollars indicates that the account holder owes 40 dollars to the institution. The negative sign denotes that the account is in debt, hence the debt being greater than 40 dollars.