For real? I’ve never though of this. This may actually be useful!
% really just means
*1/100- it doesn’t matter where you apply that factor:6% of 50 = 6% * 50 = 6/100 * 50 = 6*50/100 = 6 * 50/100Where were you when I failed math 101 4 times?
Thanks!
I was probably on a different continent ^^ Also, the biggest problem explaining math is not making it understandable, but having a motivated learner. Most students that have a bad teacher in school, or are somehow not motivated in school to begin with, will also not be motivated to focus on easier explanations. Technically a basic interest in math should be fostered / encouraged in kids from an early age, and at the latest in elementary school. If that does not work out, many students will have a hard time with it.
You are welcome.
This is the coolest trick since I learned about the “quick 20% tip on your tab” method. Take the total bill, move the decimal point one place over to the left, then multiply it by 2 to get 20% gratuity. I will sometimes round down on the change to make it closer to 18%. Also I only really need to do this when I’m drunk and can’t maths.
Why would you multiply by 2? 10% is a good tip.
As long as wages are supplemented by customers, the restaurant industry will never pay their employees a fair wage.
As a former service worker,
- fuck you
- this is NOT solidarity
- bosses won’t pay more because you pay less
- pay tips in cash. PAY TIPS IN CASH IF POSSIBLE
Why cash? So you can split my $5 with the other 20 staff members? Or so you can hide it from your team? If your boss is taking money from the tip pool paid through card transactions that’s illegal. You are forcing industry problems onto the customer and frankly it’s not my problem. I feel bad for you but all I have are likes and prayers. I’m not gonna let employees who are scared to hold their employers accountable to guilt trip me into giving them my money. 10% is extremely reasonable considering the standard for service in restaurants right now. I can’t remember the last time I didn’t have to go find a staff member to get a refill.
In restaurant cash isn’t always as important. However the boss/power dynamic and employment laws can mean service workers are often left with little to no bargaining power.
Cash is more important for food delivery services so the company doesn’t take a majority cut. Though, judging by your statements, I’m guessing you feel insulted by the very idea of tipping for delivery.
“Little to no bargaining power” doesn’t mean anything. You hold your boss accountable to treating you fairly. I met a kid that last year worked in a cash only Vietnamese sandwich shop. Only white kid there. He essentially unionized the place and stopped the owner from stealing their tips.
If a 20 year old can stand up to person like that when he can barely speak the language, I don’t want to hear about how a group of Americans who don’t have to fear of getting deported or send any money back home to feed their family struggle in the work environment.
It really sounds like a crazy story but he did it and probably changed some of those workers lives. And don’t even get me started on delivery fees that for whatever reason the workforce agreed shouldn’t be paid to them.
Neat, good for that kid!
6*50/100 = 50*6/100 if anyone is curious why this works.
My dyscalculic ass trying to remember what 50% of 6 is
Probably 5 tbh
23% of 53
Pretty close to 1/4 of 52, so like 13-ish, but maybe closer to 12.
.5*23=11.5
0.01*23=0.23
3*0.23=0.69
11.5+0.69=12.19
May as well just get out the calculator app to make sure. My point with those numbers is to just use a calculator. Why 2nd guess anything?
If “close enough” works, then it’s nice to have the skill. Having the skill requires occasionally using it.
Where accuracy is important, since we almost always have a calculator with us now, that’s a no-brainer.
Maybe more to the point, though, understanding how percentages work is wise. It’s one of the few arithmetic topics that we encounter regularly in life.
In this case, 23% of 53 and 53% of 23 each have their own little trick, depending whether you’d rather overestimate a little with 1/4 of 52 or underestimate a little with half of 24. I find it handy to be able to think that way, especially for example when trying to get out of a taxi and paying cash.
Babagedegaga. Ba.
x/100 * y = x * 1/100 * y = x * y/100
I never would have thought of it myself and still feel like I should have thought of it myself.
Legitimately new knowledge for me that will literally make my work easier. Wish I could give you more than 100% of 1 upvote, OP!
I wish someone told me this trick 30 years ago.
Huh. Learning a fun and cool math trick was not on the list of expected outcomes for today, but I’ll take it!
Yes, 47% of 47 is certainly much easier to determine when you look at it as 47% of 47! Genius!
You can also
Multiply one side, divide the other to get the base number to get the base number to 100.
6% of 50 == 3% of 100 == 3
5% of 20 == 1% of 100 == 1
7% of 50 == 3.5℅ of 100 == 3.5
14% of 200 == 7% of 100 == 7Edit* as pointed out below, this one was incorrect.
14% of 200 == 28% of 100 == 28
You don’t have to stop at percentage either.
25 * 16 = 100 * 4
If you’re doing addition, you can add and subtract.
27 + 13 = 20 + 20
Most of the difficulty is in realizing that one number or the other can be brought up to a nice round number, making the equation simple to do in your head. And obviously, just getting to around number on one side doesn’t always make it easy on the other side.
I always loved screwing with math problems to make them easier, which is weird, because overall, I don’t really care for math.
I also do shit like borrowing a couple of numbers to make the equation easy and then pull them back out.
392 / 4 == (400 - 8) / 4 == (100-2) = 98
376 / 4 == (400-24)/4 =100-6=94
Of course it goes up a level when the remainder isn’t evenly divisible. But I still find it’s something I can handle in my head.
371 / 4 == (400-29)/4= 100-7¼ =100-7.25=92.75
Why do you have to divide on both sides in your example with 14% of 200?
Are you just out here doing common core math on here like it’s just some smart trick to make math easier?! You dirty bastard, some conservative is going to see this and think it’s a good idea, then they’ll just innocently do it in front of their conservative friends and all hell will break loose. Homosexual fornication will suddenly run rampant through the group and those few that can resist the call of the devils numbers will have to cull the rest. You know… Actually… I am not completely against that now that I think about it…
That’s because multiplication is commutative
taking a percentage of something essentially means multiplying it with a hundreath of the percentage
6% of 50 essentially means 50 * 0.06
or 50 * 6 * 0.01and since
50 * 6 * 0.01 = 6 * 50 * 0.01
then of course
50 * 0.06 = 6 * 0.5And we have the above
Yeah my brain just sees 5*6, and then I move the decimal. I never understood how people couldn’t figure out tips when they wanted 20%.
If you live in the U.S. you do them quite often, multiply by 2. Want 10 multiply by .1… Half that and add it if you want 15. Whatever is easiest at that moment
I prefer to keep it technically correct yet evil and confusing. 6% being a fancy way to write 0.06 or 6 * 1/100 means we can take 6 * 50 * 1/100 and simplify to 300 * 1/100 and then represent that as 300%.
Finally a reasonable way to do percentages! Thank you, I’m stealing this
Teaching stats and using percentages now and again, it’s not really that useful of a tool most of the time since you aren’t usually working with an easy number like 50 (Or 10, 20, 25, etc.).
Usually what I’m doing is breaking it down into manageable parts (factors), so 6% is 5% + 1% which I can usually do in my head regardless of the number (or if 5% hard, work in increments of 1%, which I can multiply by 6).
It’s a pretty common strategy to with with factors. Just surprised how many of my students don’t know it!
Danke
Surprised how many people don’t know this. I suspect it is because people forget that percent literally means per 100 or /100 and the of is standing in for multiplication. So 6% of 50 is 6/100 * 50 or 6 * 50 * 1/100
I’m still doing a rule of threes either way.
Surprisingly not as useful as u would think unfortunately
