Siri will calculate tips for you, just ask "$45.70 plus 20%" to get the amount, then follow up with "divide by three" to split. The Apple Watch has a built-in feature for calculating tips and ...

The best way to calculate a tip is simple: multiply the sales tax. After writing about math for five years, I'm surprised there's still so much variation in how people choose to do this everyday math.

A restaurant customer has revealed a trick for leaving the perfect tip every time - but others are not convinced. TikTok user Alex Newnam, from Kentucky, shared a quick and easy hack to help calculate ...