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 29 by the denominator 8:
29 (numerator) ÷ 8 (denominator) = 3.63
As a result, you get 3.63 as your answer when you convert 1 21/8 (or 29/8) to a decimal.