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 129 by the denominator 19:
129 (numerator) ÷ 19 (denominator) = 6.79
As a result, you get 6.79 as your answer when you convert 3 72/19 (or 129/19) to a decimal.