There are a lot of people who cannot calculate what 10% more equals to. You mentioned that's an estimate and often not correct, so even if you do the calculation, there's a good chance it's wrong. A lot of people are on a budget and what is a rounding error to you, could be the difference between being able to afford it or not for them.
In Germany different tax rates apply to items that you need to survive such as food and other goods. It can be difficult to know which rate applies to a product. The good thing is you don't need to know because the total price is displayed
In Germany different tax rates apply to items that you need to survive such as food and other goods. It can be difficult to know which rate applies to a product. The good thing is you don't need to know because the total price is displayed