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 4:
81 (numerator) ÷ 4 (denominator) = 20.25
As a result, you get 20.25 as your answer when you convert 81/4 to a decimal.