One method to convert 39/10 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 39 by the denominator 10:
39 (numerator) ÷ 10 (denominator) = 3.9
And there you go! We got 3.9 as the answer when you convert 3 9/10 (or 39/10) to a decimal.