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 78 by the denominator 21:
78 (numerator) ÷ 21 (denominator) = 3.71
As a result, you get 3.71 as your answer when you convert 2 36/21 (or 78/21) to a decimal.