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 13:
81 (numerator) ÷ 13 (denominator) = 6.23
As a result, you get 6.23 as your answer when you convert 3 42/13 (or 81/13) to a decimal.