- cross-posted to:
- funny@lemmy.ml
- cross-posted to:
- funny@lemmy.ml
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What’s it called when you “tether” a certain value at 100%. Often for economic graphs. In that case the second guy could be correct and if that’s all they know it would make sense
Yeah he totally cooked Yang. That guy has NO IDEA where the 9 came from.
Yang botched it by chaining
=wrong.100 − 10 = 90 + 9 = 99
❌ cringe
100 − 10 = 90
90 + 9 = 99✔️ based
Brought to you by the same people that can’t explain tides
yeah they think the MOON does it lmfao, everyone knows it’s the CIA’s totally epic wave machine for selling more surfboards 🌊🏄♀️🐟
Ah yes I hate those
And hate windmills
At least they keep the turtles cool
Windmills do not work that way! Good night! 😂
Can’t have a good night, there’s no power because windmills only work in the day! smh
Please watch S04E08
Tide comes in, tide goes out. You can’t explain it!
Bread goes in. Toast comes out. It’s a mystery!
Magnets, how do they work?
Nobody knows! Like how you can only see the effects of the wind, but can’t see or explain it.
That knowledge is probably locked away in the 90% of our brain we don’t use.
For anyone who doesn’t get the reference, here you go
pegglegg back in fifth grade: ‘why i need to learn this math stuff. i aint never gunna use it’
It’s not that you will regularly have a calculator in your pocket
Checkmate
you still need to know what buttons to push on the magic box, and in what order…
Yeah the “checkmate” was supposed to signify that irony
“It’s not like you’ll regularly have a little box in your pocket with access to the sum of all of the knowledge in the world but you’ll have to sift through an equal amount of incorrect knowledge and have the ability to differentiate the two.”
That kind of math didn’t start for me until letters started showing up in it. This is basic shit though!
Some bureaucrats in Mexico City tried this years ago.
An important ring road had two lanes in each direction. To increase its capacity, they didn’t actually widen the road; they just repainted the lane markings to turn two lanes into three, and claimed a 50% capacity increase!
Everyone immediately screamed about being crammed together just centimetres apart, accidents increased and the city officials quickly u-turned; they repainted to have just 2 lanes in each direction again.
But they then tried to claim that as that was a 33% decrease, and that because they had earlier increased it 50%, that meant they had achieved a net 17% increase in the road’s capacity!
Bunch of methamagicians up in here
This is why in forecasting and time series analysis is used the log difference, a 10% increase or decrease on the log scale gives you the same value being added or removed.
Yes, that requires a reference value to be decided upon beforehand.
Not really, you do t=n and t=n+1, for n= 1, 2, 3 for a quick view on volatility.
Then ypu look up for correlations between e[t=n | t= 0, t= 1…] for different Ns. For more I would need to check out my notes
Oh I was imagining something entirely different. Like a simple logarithmic scale of a signal, I do not know anything about time series analysis. Should’ve kept my mouth shut
Not even close to that anyway, the dow jones for example went from 44k to 37k back up to 40k. Still hasn’t even regained half the value it lost.
TBF Yang really did write the equation in the sloppiest way possible.
Like I know what he MEANS but no math professor in the world would let this shit slide.
Yeah if you put it:
100 - (100 x 0,1) = 90
90 + (90 x 0,1) = 99
It comes quite obvious. And I know the brackets are redundant, but my coder mind forces brackets to all math formulas for readability.
Was it on purpose, maybe.
Decimal commas ain’t 'merican: you’d totally throw them with your weird euro math.
Readability is important. I do the same thing, because just because something is technically correct doesn’t mean there isn’t a better way to do it. I’m very pro-bracket.
Even
100 - 10% = 90
90 + 10% = 99
Works better than what he did, because that’s how you’d enter it on a standard calculator.
Um you can type like that into a calculator?
Sure can.
And yes I was stunned as well when I learned it, because that’s not how it’s taught in schools. I used to do exactly what the previous commenter did, and then one day I saw some illiterate mouthbreather type it in like that and I was like “nuh-uh, that’s not how that works, gimme that thing and let me show you.” And I typed it in the long and “correct” way, and whaddayaknow? Same result.
But it makes sense when you think about it, calculators were literally invented for business use (and most business people are notoriously bad at math), and one of the most common uses in business is figuring out how much something should cost after applying a discount.
Like an actual calculator or one on the computer?
It works on both. I tried the calculator apps on iOS and Windows and they both worked that way. And if you still have a regular old digital calculator, it should work on that too.
Nope just tried. 7+10% = 7.1 It converted 10% to be 0.1
Most of the ones I’ve used work that way.
An actual calculator or a computer?
100 - 10/100 ≠ 90
I’m not a fan of this at all and wish people would treat percentages as if they were a unit. x% is x of y per 100 total.
x% = x yi / 100 ytotal
Where yi is the species in question.
My cup is 90% full: My cup contains 90 unitswater / per 100 unitscup
This is why I don’t like Baker’s percentages. I guess it makes sense, because it’s still per cent, but they’re mixing the meaning used practically everywhere else these days.
50% water for baking isn’t 50 unitswater / per 100 unitsdough, it’s 50 unitswater / per 100 units**flour**. In my mind that means you have 33.33% hydration, not 50%…
Just feels weird to not express that as a ratio. But I guess it’s a shorthand that works for them :/
Yes I understand all that but I’m telling you standard calculators literally work that way.
Just launch the calculator app on your phone or computer and give it a try, you’ll see.
I never used the percent button, lol. I am not about to start. Something about this doesn’t jive with my soul.
This is very upsetting
Thanks for the heads-up. I would have been happier never knowing haha
The implied brackets. THE IMPLIED BRACKETS!! The horror.
Thanks for the response kind soul
No worries. Yeah I get that it’s a bit weird if you know how to do it properly but it’s actually a fairly helpful trick for quickly calculating discounts, which I assume is the indented use. Remember, calculators were designed for lazy business folks who suck at math.
This is exactly how someone who failed HS math would think about the problem, and conveniently, it just works.
I think of it as
100 x 0.9 = 90
90 x 1.1 = 99
Am I the odd one out?
Percentages for show, decimals for a pro
Shameless plug for Engineering Memes community ported during the great API migration: !engineeringmemes@lemmy.world
Yes.
But also, Barqs does have bite.
It’s twitter, why’d anyone put effort in what they write.
That’s what makes it great bait
Yeah, for idiots
I thought this was c/funny not c/deeplyconcerning
You want concerning…talk to teachers about gen alpha. They can’t read well, their grammar sucks, they can’t use PC’s, they’re super gullible and believe/want to purchase whatever online influencers tell them to, and just believe whatever pops up at the top of their search result or AI says.
I am not convinced Alpha is unique in their gulliblity and think we should all be hesitant to believe anything we hear online about how bad ‘the youths’ are.
It’s only the same if it’s up 10% compared to the original number. It all depends on your time period, you could be up 30% compared to 7 years ago.
Tesla stock prices are good example of this. They are down ~50% since december and up ~70% since lowest point in april last year.
I wonder why he has a peg leg
I have seen this or a variation of this too many times now, saving this for my own meme responses, its too fucking useful.
