Now, we know that this guy, this value of negative zero point 76 represents the value for the anode. So we use this formula to solve for our cathode. So we know our 0.36 volts, which is told by the voltmeter. Now, this we don't know. So we let a DX minus now in parentheses we have a negative 0.76 volts, right? So negative and negative becomes a positive.