Solve Electric Potential - Find Charge (9e-05 J)

[BuBbLeS01]

Homework Statement

Moving a charge from point A, where the potential is 284 V, to point B, where the potential is 83 V, takes 9e-05 J of work. What is the value of the charge?

Homework Equations

The Attempt at a Solution

I know this is a very easy problem but I am not getting the right answer...
I thought it was just...
Uel = qV
q = Uel/V
q = 9x10^-5 / (284-83) = 4.478 x 10^-7 C

 

[quantumdude]

If it takes positive work to move the charge from high potential to low potential, then the charge must be negative.