How to Calculate a Tip in Your Head (15%, 18%, 20%)
You don't need an app to tip well. Three shortcuts get you 15%, 18% or 20% in seconds, plus a ready-made table and answers to the common tipping-math questions.
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You don't need an app to tip well. Three shortcuts get you 15%, 18% or 20% in seconds, plus a ready-made table and answers to the common tipping-math questions.