I want to know how much slippage % is required for the transaction to pass.
For tokens that already have large liquidity, usually a slipage of 0.5% is sufficient. High slipage is usually only used to swap shit tokens, if you are confused about how much slipage you need to use, you can use the poocoin.app platform
There you do not need to adjust the slipage, because the slipage will automatically adjust to what is needed.