Radius of a ball

A circle has a radius $R$ and a circumference $l$ . If we increase the radius of this circle by 1 unit, then the ratio between the new circumference and the old circumference of this circle can be expressed as $A + \dfrac B{CR }$ , where $A,B$ and $C$ are integers with $B,C$ coprime positive integers.

Submit your answer as $A+B+C$ .