One method to convert 138/9 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 138 by the denominator 9:
138 (numerator) ÷ 9 (denominator) = 15.33
And there you go! We got 15.33 as the answer when you convert 15 3/9 (or 138/9) to a decimal.