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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.
Keeping the decimal in the right place is the trick for me when I do it in my head.
True mathematics derives from established mathematical theory, not some farcical aquatic armored vehicle!
Help help I’m being irrationalized!
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.
Oh panzer of the lake, why am I still single?
Are you sure you can stand the answer?
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.
6% of 50
6/100 * 50/1
(6 * 50) / (100 * 1)
(50 * 6) / (100 * 1)
50/100 * 6/1
50% of 6
Works for multiplying any fraction, not just percents.
2/3 of 5 is the same as 5/3 of 2.
2/5 of 7/8 is the same as 7/5 of 2/8.
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
Wait…
So 25% off $100… is 100% off $25! TrollfaceI mean if you remove the word off it works. 25% off $100 is $25 100% of 25 is 25 it’s still reversible you just let the word off confuse you
You could also make sure to carry “off” to both sides when you swap:
off of $100 is 100% of $25 off
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.
I was waiting in a car in front of a math tutoring building and was doing the math problems 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.
👆 This guy… fucks?
Calcufucks?
Calcu-lust?
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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.
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 any base value C, (100 - X)% x ((100 + X)% x C) = (100 + X)% x ((100 - X)% x C) = (100 - (X^2/100))% x C
This one irks me to no end.
It was recently discovered that all AI everywhere was connected to the Panzer all along. /s
In either case I would multiply 5 by 6 and move the decimal. Interesting though.
6 of 50 is 300. % just means 1/100. That’s also a good way to think of it.
transitive and commutative
Subtraction and division is a lie! Only addition and multiplication are the truth!
and, of course, only natural numbers may be used, excluding zero
But of course! And don’t forget, they must be in the Roman numeral format.
What is (((M))) × (((M)))?
(((M))) × (((M))) = (((M))) × (((M)))
How is 17% of 83.27 easier then 83.27% of 17?
Oddly, yes.
Percentages also add together in partials. As in 10%+5%+2% = 17%
So, you start with the 10% by moving the decimal over 83.27 becomes 8.327
Then add half of that (5%) to its self and get 12.49 (rounded)
Then take the 10% number and move the decimal over once more (1%) for 0.833 and double it (from 1% to 2%) and get 1.666 and add that to your running total to get your answer of 14.16 (rounding)
And when I calculator check this I got 14.1559.
Thanks tanks!
Holy shit you solved my life there
