One method to convert 51/13 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 51 by the denominator 13:
51 (numerator) ÷ 13 (denominator) = 3.92
And there you go! We got 3.92 as the answer when you convert 3 12/13 (or 51/13) to a decimal.