1. The problem statement, all variables and given/known data 2. Relevant equations V=IR 3. The attempt at a solution I'm not sure if this is right, but I did this problem by finding the current in the 300ohm resistor by doing I=5V/300ohms = .0166A and since they are in series they have the same current. I don't think that is right though. The LED is 2V, so I'm not sure how to treat that.