tipping at chinese restaurants... without, amount

siuyudim

do you tip on the amount without tax or total inclusive of tax?

siuyudim

i went to a chinese restaurant for those set dinner and realized they rounded up my bill on my credit card statement, the amount is not much more but i don't agree with what they did. i tipped before tax and they rounded up so it's 10% after tax.. i authorized $495 and they changed it to $496.98....=__=.