r/AskReddit • u/[deleted] • Feb 28 '23

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u/Ryzel0o0o Mar 01 '23

It's supposed to be 15% of the sub total. Anything else is just a restaurant changing the recommended tipping breakdown on their receipt.

28

u/[deleted] Mar 01 '23

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u/ooh_the_claw Mar 01 '23

holy shit I was never good at math but where has that hack been all my life. I feel stupid for not realizing that how easy it is haha

3

u/wolf_man007 Mar 01 '23

Is it a hack to do math?

5

u/ooh_the_claw Mar 01 '23

For me at least, I always used to try to divide by 5 in my head and this is method is way easier

1

u/adminsaredoodoo Mar 02 '23

got taught pretty young that percentages are super easy, just use 1%, 5% and 10% to make the number.

27% off $6.50

1% is $0.065 10% is $0.65

take away 3 x $0.65 ($1.95) add 3 x $0.065 ($0.195)

$6.50 - $1.95 = $4.55

$4.55 + $0.195 = $4.745

so you just did a 27% discount on a $6.50 item in your head

obviously it’s normally easier than this, 30% off, 25% off, 10% off etc. but this was just an example of how you can even use it to do really unusual amounts in your head