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 31 by the denominator 138:
31 (numerator) ÷ 138 (denominator) = 0.22
As a result, you get 0.22 as your answer when you convert 31/138 to a decimal.