The absolute value of the electric potential at a distance of 4M from a certain point charge (Physics Help)

Hello fellas, need some help with this. thanks so much in advance for your input.

The absolute value of the electric potential at a distance of 4M from a certain point charge is 200 V. What is the absolute value of this potential at a distance of 8 M from the same point charge?
A) 50V
B) 400V
C) 100V
D) 200V
E) 600V

Using:

E = - (ΔV) / (ΔS) Where ΔV is the electric potential difference and ΔS is the distance
E = - 200 V / 4 m
E = - 50

When ΔS is 8 m
E= - (ΔV) / (ΔS)
50 = (ΔV) / 8
(ΔV) = -50 x 8
(ΔV) = -400
What is the absolute value of this potential ?
(ΔV) = I-400I note I I means absolute value
(ΔV)= 400V