Call the overbet?

[ajmargarine]

Hypothetical. NLHE. It's heads-up and you have just seen the turn card.

$100 pot. Villian goes all-in for his remaining $200. You have him covered, so it costs you $200 to call.

You put him on a range of hands that tells you with the river card to come:
--If you are ahead, you win 90% of the time.
--If you are behind, you win 20% of the time.

You estimate that you are ahead 40% of the time here, and behind 60% of the time.

Call or fold?