What can be easier? The main formula for two outcomes (when there is no draw option) is (100/1odds+100/2odds)-100 or you can find odds on 50/50 match and count this way – (100/odds*2)-100. Lets calculate margins of bookies where i am playing now – Fanobet and EGB!
Fanobet odds on 50/50 match – 1.83 => (100/1.83*2)-100 = 9.28%. Also you can get 1% cashback on every bet, so basically fee is
9.28%-1%=8.28% 8.69% if you include 0.01 cashback value into 50/50 match odds (100/1.84*2)-100
EGB odds on 50/50 match – 1.86 => (100/1.86*2)-100 = 7.52%. If you are using EGB rewards system smart (How to get biggest cashback on EGB) – you will get 4.72% cashback, so basically egb fee is (100/1.9072*2)-100 = 4.86%
But betting is not about bookie margins, its all about catching sweet odds. I mean, if you think that betting on Team1 over 2.5 odds have value, what bookie will you choose?
Bookie One. Team1 2.66 odds against Team2 1.5 odds
Bookie Two. Team1 2.90 odds against Team2 1.25 odds
Bookie Two has literally scam cut but you for sure will choose it to make your bet.
Or you will maxbet Team1 on both bookies like I do