영어공부 게시판

Hi,

I'm enjoying your articles. I have some questions.

I was wondering how much tip I'll have to give whenever I'm eating at restaurants.

In Korea, we don't have any tipping culture in general. Servers at restaurants don't expect any tip.

My questioins are specifically as follows.

When people say about 15% for the tip, Is it based on 'before tax' or 'after tax"?

Another question is how much tip we'll have to give when we use buffet restaurants where just drinks might be served?

Thanks for your advice

Joon