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Is 20 Percent A Good Tip? [Solved]
For the wait staff at sit-down restaurants, the tip should be 15 to 20 percent of the pretax bill. Tips are not necessary when you pick up your order or at fast-food restaurants.15 Dec 2021
Math Tricks to Easily Figure 20 Percent
Math Tricks to Easily Figure
Easy way to calculate a 20 percent tip 
Don’t have a calculator here’s an easy way to calculate a
Tipping is out of control
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