When each participant shows a plus or minus sign preceding the odds, such as +150 or -150, this indicates the more favored player or team versus the less favored, with the minus sign indicating the favorable bet (the bet with the higher probability of success - the favorite) and the plus sign depicting the unfavorable one (the bet with the lower probability of success - the underdog). For example, a bet that would pay $200 on a $100 bet pays $20 on a $10 bet. Though this system bases odds around $100, larger or smaller bets scale easily in this system. American odds center bets around $100, with the favored outcome listed differently than the underdog. While not as simple to read as decimal or fractional odds at first, American gambling odds become fairly easy to understand once you know how to read them.
