You have the folllowing fraction given in the exercise:
Where 1 is the numerator of the fraction and 9 is the denominator of the fraction.
In order to write a fraction in decimal form, you only need to divide the numerator by the denominator.
Keeping the above on mind, you must divide the numerator 1 by the denominator 9.
Therefore, following this procedure, you get that that fraction written in decimal form, is: