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 145 by the denominator 31:
145 (numerator) ÷ 31 (denominator) = 4.68
As a result, you get 4.68 as your answer when you convert 4 21/31 (or 145/31) to a decimal.