10X - X 38.3333.... - 3.8333.... = 34.5 so 9X = 34.5 X = 34.5/9 Multiple both top and bottom by 2 to get rid of decimal. 69/18 Normalize it to get rid of improper fraction. 3 15/18 Simplify 3 5/6
If the number is 3.838383838383.... then X = 3.83838383... 100X = 383.83838383...