A fraction is usually split into two parts: the first part is the number on top, called the numerator; and the second part is the number on the bottom, called the denominator. These are both separated by a line called the “divisor line”. We can use the division method help to solve this question: to get a decimal, simply divide the numerator 81985 by the denominator 1000 (which you can enter in any calculator):
81985 (numerator) ÷ 1000 (denominator) = 81.99
And finally, you get 81.99 as your answer when you convert 81 985/1000 (or 81985/1000) to a decimal.