The change in electric potential energy is -157 V.
The change in electric potential energy can be calculated by subtracting the final electric potential from the initial electric potential. In this case, the initial electric potential is Va = -222 V and the final electric potential is Vb = -379 V. Therefore, the change in electric potential energy is:
ΔV = Vb - Va
ΔV = (-379 V) - (-222 V)
ΔV = -157 V
Therefore, the change in electric potential energy is -157 V.