Fractional format

Has a second name - English. Used by bookmakers working with the UK audience.

The fractional version of the odds is as follows: 1/3, 11/1 or 8/15. The fractions reflect the ratio of shares, where the first part belongs to the BK and the second to the player.

Let's decipher:

1/3 - to win 1 part, you have to bet 3.

10/1 - 10 pieces can be taken by betting only 1.

8/15 - wishing to get 8 shares, it is necessary to give 15.

Fractional odds are converted to decimal. 1/3 equals 1.33 (divide 1 by 3 and add 1).

10/1 is 11 (10/1 1=11), to 8/15 is 1.53 (8/15 1=1.53).

English variant allows you to see how advantageous the odds are, reflecting the shares of the betting participants. You can calculate your winnings in a bookmaker's office the same way as with the European variant - by multiplying by the odds. For example: 10$*8/15=5.33$. But here we make profit at once. If the bet goes in, the player will get back $15.33.

American format

This method shows the ratio between the bookie and the bettor, which is typical for the USA.

There are two types of odds:

minus - show how much you have to give up to get 100 units - -250, -110 or -450;
Plus odds - show how much you get net profit for 100 units - 1100, 300, 700.

American quotes are also useful for understanding how much you can win or lose by betting. The minuses or pluses show the benefit and probability of the outcome, which is useful in determining valuability (profitability). If we compare with the decimal format, the pluses are all odds above - 2, and the minuses - below.

For example, American odds -133 is equal to the European 1.75.

The formula for converting minus quotes: K=100/keff 1.

Consider: 100/133 1=1.75.

K 2.5 is equal to 150.

Conversion formula for positive quotes: K=kef/100 1.

Consider: 150/100 1=2.5

Let us summarize the principles of the conversion.

With minus EK = 100/AK, and with plus - EK = AK/100. In both cases we add one (EC is European, AK is American coefficient).

Consider how bets are calculated in a bookmaker's office with American odds. Let's take K 300 as an example. Betting $100 will result in a net win (profit) of $300. If we take $5, we get $15 ($5*300/100=$15). 
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