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 15 by the denominator 6:
15 (numerator) ÷ 6 (denominator) = 2.5
As a result, you get 2.5 as your answer when you convert 1 9/6 (or 15/6) to a decimal.