Tipping in the service industry

[Gawdzilla Sama]

I tip 20-25% because I'd pay a lot more than that to have someone else do the shopping, cooking, serving, and clean up.

I tip about that much, too.  Sometimes more, only because I suck at math.

I broke my math bone when I was in the 5th grade, and it never healed properly. Now my phone has one of them adding machine things. (Not "abacus", something else.)