Strip the juice from any two-way line and see the fair price.
Every posted line includes the book's margin (the vig). Two -110 sides imply 52.4% each, which adds to 104.8%. The extra 4.8% is what the book keeps over time.
Removing the vig rescales both probabilities so they add to 100%. The result is the market's fair estimate of each side, which is a better baseline than the posted price when you want to judge whether a bet has value.
Fair-price math like this is a standard part of how sharp bettors judge a line, and a good habit to build before any bet.
Check what a bet is worth given your odds and your win probability.
Combine up to eight legs and see the true payout and implied odds.
See how much margin the book has baked into a market.
Work out the hedge stake that locks in the same profit either way.
Size a bet from your edge and bankroll with the Kelly formula.
See what a bonus or free play is really worth after the rollover.