5 to 6 odds means that, out of 11 possible outcomes, odds are that there will be 5 of one kind of outcome and 6 of another kind of outcome.
In this case, you are given 5 to 6 odds, which means that out of 11 possible outcomes you will win a bet 5 times, and lose it 6.
In fraction, it will look like this:
![(11)/(11)\text{ \lparen these are all the possible outcomes, which equals 1\rparen = }(5)/(11)(the\text{ outcomes in which you win, which equals .4545, so 45.45\%\rparen + }(6)/(11)\text{ \lparen the outcomes in which you lose, which equals 0.5454, so 54.54\% \rparen}]()
Because of that, the probability of winning the bet is 45.45%, and in a fraction, it is 5/11, which means you will win in 5 out of 11 scenarios.