When looking at football betting, the number on the left hand side is how much you will win if the bet comes off. The number on the right hand side is how much money you will need to place on the bet, also known as your stake. A 10/1 bet means you will win £10 for every £1 you place on the bet. If you put £1 on it and win, you will make a £10 profit. If you place £10 on it, you make a £100 profit and so on. You can use a betting calculator to help you but many sites in the UK now show you the potential returns from your bet when you place the wager.