Holy shit you solved my life there
this post was submitted on 25 Jun 2026
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Just always convert the percentage to a decimal, and it’s easy either way.
0.06x50 is as easy as 0.5x6. They’re both just 5x6.
All these comments like “What about 47% of 3.11?” Well, yeah, of course it’s harder to multiply two- and three-digit numbers than it is to multiply single-digit numbers.
Excellent argument. However, I can't count.
Fuck. I had to calculate 4% of 7 a few minutes ago and didn’t know this. I say fuck because it wouldn’t have helped me anyway.
4% x 7
= 4% x 100 x 7 ÷ 100
= 4 x 7 ÷ 100
= 28 ÷ 100
= 0.28
My brain was more like “Okay it’s just seven point-fours. So what’s seven fours? 28. What’s seven point-fours? 2.8. That can’t be right. Fuck. Get a calculator.
I go for finding percentage factors.
4%? That's just 1% * 4. 1% of 7 = 0.07 * 4 = 0.28
14%? That's just 10% + 1% * 4 = 0.7 + 0.07 * 4 = 0.98
You tell me it's decimal, then I'm gonna Decimal.
True mathematics derives from established mathematical theory, not some farcical aquatic armored vehicle!
Help help I'm being irrationalized!
Thanks tanks!
It was recently discovered that all AI everywhere was connected to the Panzer all along. /s
Strange Panzers lying in ponds distributing shells is no basis for a system of government…
Surely you don't think supreme executive power derives from a mandate from the masses?
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Oh panzer of the lake, why am I still single?
Are you sure you can bear the answer?
This is far too useful to be a shitpost.
I know right. I even open the calculator app to verify before committing to memory this nugget.
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Another counter-intuitive percentage fact: A 10 percent discount and a 10 percent fee can be calculated in either order but they don't cancel out.
Example, 90% of (110% of 10) = 110% of (90% of 10). But neither of those is evaluates to 10. They evaluate to 9.9.
For any percentage X, and and base value C,(100 - X)% x ((100 + X)% x C) = (100 + X)% x ((100 - X)% x C) = (100 - (X^2/100))% x C
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In either case I would multiply 5 by 6 and move the decimal. Interesting though.
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transitive and commutative
Subtraction and division is a lie! Only addition and multiplication are the truth!
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Let's try this on a sale item. Hmm, let's see, the sign says 25% off $6.99. So that's the same as, let's say, 7% off $25. Oh, yeah, that is much easier. /s
It’s always as easy as multiplying the two numbers. Obviously some pairs are easier than others. 7x25=175. Not too hard. $1.75 off.
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I was waiting in a car in front of a math tutoring building and was doing the math programs advertised on their window (as one does, of course) and the 7% of 250 is indeed probably easiest as 250% of 7, aka 2.5x7, which is 17.5.
I did it a few other ways, though. 7% of 1000 is 70, then divide by 4 for 17.5. Well, more like, divide by 2 for 35 and again for 17.5, but yeah... mental math is fun.
Wait, you think 0.07 * 250 is easier than 2.5 * 7?
Huh, no, I was saying the opposite. But there are easy alternatives aside from 0.07 x 250, like (0.07 x 1000) / 4.
I .... and the 7% of 250 is indeed probably easiest as 250% of 7, aka 2.5x7, which is 17.5.
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Everyone’s talking about this math. I’m wondering about the panzer.
They said the water could reach up to 50% of its 1.7 meter height before causing problems, panzer tried calculating 1.7% of 50 meters from head, this is the result.
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