And while it's not likely to happen, it sometimes does, and at 100 / 1 odds mean payout is 1 meaning we bet one dollar and get 125 back.
An explanation of how sports betting odds work, and how bookies make money. When wagers are more likely to lose than win, they will typically be odds Positive moneyline odds show how much profit a winning bet of $100 would make. Note that even money is technically expressed as 1 / 1, but is typically referred to.
If only a few people are betting on the outcome the odds will 'lengthen' eg 100 / 1, 500/ 1 so you will win much more money if you are right.