To calculate the implied probability from decimal odds the equation is:

(1/ decimal odds) * 100 = implied probability

So to find out the probability of a Murray win would be:

(1 / 5.50) * 100 = 18.1%

Therefore, according to the decimal odds of 5.50, Andy Murray had an 18.1% chance of winning.

https://help.smarkets.com/hc/en-gb/articles/214058369-How-to-calculate-implied-probability-in-betting

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