387
.... Fair
(thelemmy.club)
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this post was submitted on 25 Jun 2026
387 points (97.3% liked)
Funny
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What's the problem with this method? I figure out tips through mental math, without any paper. This is just explaining how I do that mental math
Yeah you did it in the hardest way possible hahaha
Just subtract 17 from 100 to get the cents. 83. There, done. Or at least 100 - 10 - 7
I can't do mental math that easily. I struggle with visualizing it, I think better in multiples of 5, and subtraction is more intuitive to me