Question

One less than quotient of four and a number x

Answer 1

If all you want is just how this is written, then the answer is

$\dfrac{4}{x} - 1$

That's the way it reads. However you may have meant

$\dfrac{x}{4} - 1$

We cannot exactly tell from the wording what is meant. I would choose the first one, if this multiple choice. I would note the ambiguity if a person is doing the marking.