stan took lily to his friend's restaurant on a date. the friend told the waiter to remove the $12 dessert from Stan's bill. Stan tipped the waiter
It is customary to tip the waiter based on the total bill amount, including the cost of the dessert. Since the friend removed the $12 dessert from Stan's bill, Stan should still include the cost of the dessert when calculating the tip. The percentage for tipping usually ranges from 15% to 20% of the total bill.
Let's say the total bill without the dessert was $50. Taking into account the dessert, the total bill would have been $50 + $12 = $62. If Stan decides to tip 18% of the total bill, the calculation would be:
$62 * 0.18 = $11.16
So, Stan should tip the waiter $11.16.