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 8648 by the denominator 82 (which you can enter in any calculator):
8648 (numerator) ÷ 82 (denominator) = 105.46
And finally, you get 105.46 as your answer when you convert 104 120/82 (or 8648/82) to a decimal.