Five over one is five. Dividing by one leaves a number unchanged. So, 5/1 is not the simplest form of anything, it is an unnecessarily complicated way of saying 5.

The answer for How do you write 185% as a fraction in simplest form? or What is the simplest form to write 185% as a fraction? or What is 185% as a fraction in simplest form? is 1/3 or one over three or 2/6 or two over six.

Expressed in its simplest form, by dividing both the numerator and denominator by 5, 25/70, or twenty-five seventieths, becomes 5/14, or five fourteenths.