A fraction is usually split into two parts: the first part is the number on top, called the numerator; and the second part is the number on the bottom, called the denominator. These are both separated by a line called the “divisor line”. We can use the division method help to solve this question: to get a decimal, simply divide the numerator 186673 by the denominator 384 (which you can enter in any calculator):
186673 (numerator) ÷ 384 (denominator) = 486.13
And finally, you get 486.13 as your answer when you convert 485 433/384 (or 186673/384) to a decimal.