A fraction is written in terms of two parts: the number on top is called the numerator and the number on the bottom is called the denominator. We can use the division method to solve this question. To get a decimal, simply divide the numerator 139 by the denominator 6:
139 (numerator) ÷ 6 (denominator) = 23.17
As a result, you get 23.17 as your answer when you convert 18 31/6 (or 139/6) to a decimal.