456.30
zero
20
The percentage of gratuity can vary in different parts of the country. Many people pay a 15 percent gratuity while in bigger cites people pay 20 or 25 percent. Unless a restaurant adds the gratuity to the bill, it is the choice of the customer as to what they pay.
Yes, the 18 gratuity included sign is prominently displayed at the restaurant.
You should check the contract. It probably specifies in there that they will add the gratuity.
37.90 + 15% = 43.58 Gratuity at 15% = 5.68
It will be 15 percent of the amount due.
9.99 x 15% = 1.50
A restaurant can charge 15 percent gratuity automatically. Twenty percent is considered exceptional service and cannot be charged automatically by a restaurant.
The expression "7 radical of 2535" typically refers to (7 \sqrt{2535}). To simplify this, we can approximate the square root of 2535, which is about 50.35. Therefore, (7 \sqrt{2535} \approx 7 \times 50.35 \approx 352.45).
2535-2172 = 363
Strictly speaking there are no "RULES" for gratuity in the USA. The general recommended amount for gratuity is minimum 15 percent of the check. For a buffet where the waitress does much less it can be as low as 10%. In other parts of the world leaving a tip is considered offensive.