While the words "odds" and "probability" are often used interchangeably in everyday speech, they are different scales. The definition of odds is odds=p/(1-p). To go from odds to probabilities, you just reverse that so that p = odds/(1+odds)

While probabilities are bounded by zero and 1, odds are bounded by zero and positive infinity. Odds of 10 would be a perfectly legitimate way to express a probability of 10/(10+1) = 0.909