Every price hides a percentage. It is the chance the bet would have to win to be a fair deal, and working it out turns a confusing number into something you can judge. This percentage has a name: the implied probability of the price.

For a minus price, divide the number by itself plus 100. So -130 is 130 divided by 230, which is 56.5%. For a plus price, divide 100 by the number plus 100. So +130 is 100 divided by 230, which is 43.5%. For a decimal price, divide 1 by the price. So 1.91 is 1 divided by 1.91, which is 52.4%.

Here is the catch that surprises people. Take a game priced at -110 on both sides. Each side implies 52.4%. Add them together and you get 104.8%. But two real chances always add up to exactly 100%, because one side or the other has to happen. The extra 4.8 points is not a chance at all. It is the sportsbook's fee, baked into both prices.

Because of that fee, the implied probability of a single price is a little too high. It is the chance the bet needs, not the chance it has. To get a fair estimate of the true chance, you take the fee back out, which is a short step covered in the next guides. For now the useful habit is this: read every price as a percentage, and you will never again confuse a long shot that pays big with one that is likely.

When someone hands you a pick, convert its price to a percentage and ask yourself one plain question: do I really believe this side wins that often? If a pick is priced at -200, it needs to win 66.7% of the time just to break even. That is two out of every three. If you would not bet your own money on something that likely, the label on the pick does not change the math.

It helps to practice on prices you already know. A coin flip is 50%, and the price that matches it is +100. Anything with a longer plus number, like +200, implies less than 50%, because it pays more and wins less often. Anything with a minus number implies more than 50%, because it pays less and wins more often. Once a few prices are anchored in your head, you can judge a new one in seconds without reaching for a calculator.

For entertainment and education. Nothing here predicts results or recommends a bet.