1. The problem statement, all variables and given/known data At what speed relative to a laboratory does a clock tick at half the rate of an identical clock at rest in the laboratory. Give your answer as a fraction of c (speed of light) 2. Relevant equations Δt=Δt'/√1-^2 3. The attempt at a solution My professor assigned this question to me to go over in class on our next meeting. We did not go over how to go about solving this. I have no idea where to start or if this is even the right formula to begin with. Please coach me through, Thank you!