There isn't much difference between betting odds in UFC, and other sports, except UFC odds, represented by minus and plus signs. While the underdog odds have a plus sign (+), the favorites have a minus sign (-) and are usually based on $100 bets. For example, if the underdog has +135 odds and the favorite has -150 odds, you would wager $100 on the underdog to win $135 and wager $150 on the favorite to win $100.
Since they are less likely to occur, underdog bets are usually riskier. We advise you not to wager on them as much as you would on the favorite.