按密碼的碌卡機, 貼士%選擇, 是稅後
librazhy 發表於 2011/12/31 02:05 
So, in this case, if I'm going to tip 15% before tax, how much % should I key in ? That's the question we were discussing yesterday.
Our lunch bill was $100, after tax was $112. I keyed in 15% on the machine as tipping, that was $16.8. If the tipping was $15 (15% of $100), I should key in 13.39%.... My math is poor in front of the restaurant counter. |