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 85 by the denominator 4:
85 (numerator) ÷ 4 (denominator) = 21.25
As a result, you get 21.25 as your answer when you convert 19 9/4 (or 85/4) to a decimal.