A fraction is written in terms of two parts: the number on top is called the numerator and the number on the bottom is called the denominator. We can use the division method to solve this question. To get a decimal, simply divide the numerator 100 by the denominator 8:
100 (numerator) ÷ 8 (denominator) = 12.5
As a result, you get 12.5 as your answer when you convert 12 4/8 (or 100/8) to a decimal.