this post was submitted on 06 Jun 2024
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Asklemmy

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[โ€“] Thcdenton@lemmy.world 6 points 5 months ago (2 children)
[โ€“] Reddfugee42@lemmy.world 8 points 5 months ago (2 children)

For a bill of 15.73, move the decimal over once to the left. You get 1.57. (drop the 3). That's ten percent. Let's say it's 1.50.

Half of that is 75ยข. Half of ten percent is five percent so now you have ten percent and five percent. Add them together to get 15%: 1.50 + 0.75 = $2.25 = 15% tip.

20% is even easier. If ten percent is 1.50, twenty percent is double that: $3.00

[โ€“] PresidentCamacho@lemm.ee 4 points 5 months ago

Also if u know what sales tax is in ur state u can double it. It's 8% I believe in Cali, so I double to 16% and then feels math it up or down

[โ€“] Thcdenton@lemmy.world 2 points 5 months ago

I literally can't read that.

[โ€“] toototabon@lemmy.ml 5 points 5 months ago (1 children)

Alternatively, pressing 0 can be quite easy.

[โ€“] cRazi_man@lemm.ee 4 points 5 months ago (1 children)

I can calculate 0% of anything in my head quite quickly. Try me.