You can express any fraction/number to arbitrary decimal places by using a backtick followed by number of digits required. For example:
This is the same as
N[4/3, 20]. Now combine this with
AccountingForm, which never uses scientific notation to get the output that you desire.
However, be aware that
AccountingForm uses parentheses for negative numbers:
Daniel Lichtblau has a good point that although using
N might be shorter in this case, in general, it might not give the same result — for example, compare the digits of
N[Log,50]. You'll see that they differ in the last couple of digits. However, for small use cases, the difference might be insignificant.