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 81 by the denominator 39:
81 (numerator) ÷ 39 (denominator) = 2.08
As a result, you get 2.08 as your answer when you convert 1 42/39 (or 81/39) to a decimal.