Customs vary around the world, and it's important to know them when you want to visit a new country. There are many different aspects to consider, and this is not a minor one at all: TIPPING. How much money are you expected to give after dining at a restaurant, taking a taxi or having some food delivered to you? It is not the same everywhere, the amount varies and even the situations when a tip is required. It may be a must in one country and totally unwelcome in another.
Take a look at this chart and compare the differences.
(Click on the image to enlarge it).