One method to convert 85/21 to a decimal is by using the division method. Before we move ahead to the method, here is a quick recap on fractions: A fraction is a number representation that is broken down into two parts - the number on top is called the numerator, and the number on the bottom is called the denominator. To get a decimal using the division method, simply divide the numerator 85 by the denominator 21:
85 (numerator) ÷ 21 (denominator) = 4.05
And there you go! We got 4.05 as the answer when you convert 3 22/21 (or 85/21) to a decimal.