1. The problem statement, all variables and given/known data Charge q1 is 0.16 m from point A. Charge q2 is 0.40 m from point A. The electric potential at A is zero. Calculate the ratio q1/q2 of the two charges. 2. Relevant equations V= kq/r 3. The attempt at a solution I did kq1/r1 = kq2/r2 q1/q2 = r1/r2 q1/q2 = 0.16/0.40 q1/q2 = 0.40 My magnitude is right, but the answer is a negative, -0.40. What am i doing wrong?