Gambling is becoming a popular thing in my locality almost everyone gamble and even colleagues gamble and engage in gambling related discussions at work, so gambling is legal and very popular so there is no Shame in using part of a salary to gamble with that is why I am asking the question of what the right percentage from my salary that I should use to gamble?
Gambling is popular and legal in your country, are you sure you don't want to get involved in this because your colleagues are involved?
Well, the percentage to be taken from your salary to gamble is based off on your salary amount, and how far the salary covers for any expenses before thinking of removing any to gamble as there is no certainity that you will recover.
For me, I think 1% is ok, since you are a starter so no need to over leverage for now, till you understand what gambling entails.
I would greatly advice if you have any other source of income, or discretionary funds you can use that to gamble rather than your salary.