Thanks, NA. I understand "against" need not be expressed. It's just something I need to keep in mind. I also understand craps odds are fixed, because based on the chances of any number showing vs. the 7. But, there is a difference between actual odds and payout odds. Example: the 6/8 show 5:6, five against 6. But, for payout, they are reversed: 6:5. Bet $5, win $6. If betting the don't, then it's 5:6, the actual, or true, odds. I know sports odds are not fixed like craps, but are variable according to the sport & situation. But, from what I already said re: the difference between actual odds & payout odds, the Spurs odds, 19-5, are payout odds. Actual odds have to be 5-19, 5 against 19, or 5 out of 24 chances. To me, that can be expressed as a fraction, 5/19, which can be converted into a decimal number. Or should I figure 5/24?