I can answer that question.
You need to call 580 to win 1460 (580+880).
580/1460 = 0.39726 so you need 39,726% equity to be ev0.
If we pokerstove our hand vs that range (
http://www.pokerstove.com/ ):
equity win tie pots won pots tied
Hand 0: 36.580% 36.00% 00.58% 286044417 4588652.00 { Jh8d }
Hand 1: 63.420% 62.84% 00.58% 499287335 4588652.00 { 22+, A2s+, K2s+, QTs+, JTs, A2o+, K2o+, QTo+, JTo }