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What's the most basic thing you can't do? (lemmy.ml)

submitted 5 months ago by [email protected] to c/[email protected]

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[–] [email protected] 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 75¢. 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

[–] [email protected] 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

[–] [email protected] 2 points 5 months ago

I literally can't read that.