Data Binding is not working when binding value at the mvvm and converting and displaying values

Here I am Binding LeftValue and RightValue to my MVVM MinAge and MaxAge Properties respectively.
and converting and displaying on Label lowerRangeValue and upperRangeValue.
but at the time of debugging it is not showing lables. and it is giving 0 in MVVM.
What should i do here? is there any solution?