Berikan tip paling tidak sebesar 15%. Gunakan matematika untuk menghitung tip. Periksa apakah tagihan sudah termasuk tip.

I'm interested in that, but I only have a few mins. Can you give me at most the first 500 characters of a detailed explanation in English about that?
The baseline for how much you should tip your server in the United States is at least 15 percent when eating in a restaurant. However, this is generally considered the minimum. If you leave anything less than this, it’s likely the server will be very offended.  Be aware that tipping only the basic 15 percent is considered a statement that the service was just average or OK to some servers. Consider tipping more if you thought the service was better than average. Consider tipping 20 percent if th