I'm really bad at math. Need help figuring out this allocation

[DeletedUser394]

I need to divide 2 specific assets.

Group A has to represent 90%
Group B has to represent 10%

I don't know the value of group B.

Let's say the value of Group A is $45,000, how do you figure out Group B so that it represents 10% of Group A + B, and not just 10% of Group A?

What's the math behind this? I'm assuming it's simple fractions, but it's been a while... lol

Thanks!

 

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[Gruby Phil]

Come on man:
45,000 = 90% (/9)
5,000 = 10% (*10)
50, 000 = 100%

 

[Charnell]

Yeah, if you know group A is 45,000 @ 90% , and group B is an unknown value @ 10%, divide 45000 by .9 (90%) to get to total amount (50,000), then multiply that by .1 (10%). Group B is 5000

45000/.9
50000*.1

 

[jpmartin]

Simple way of doing this...

45,000 represents 90% (or .90) >>> so basically do 45,000 / .9 = 50,000. So you get for the full 100% = 50,000. Now you know what 10% represents, 10% of 50,000 = 5,000.

 

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[DayIFly]

To get the concept of such calculations, get familiar with the Rule of Three:
http://en.wikipedia.org/wiki/Cross-multiplication#Rule_of_Three

If 45,000 stands for 90% (i.e. 0.9), what value "x" stands for 10% (i.e. 0.1)?

45,000 / 0.9 = x / 0.1

solve for x:
x = (45,000 / 0.9) x 0.1
x = 5000

 

[Daniel A]

It's coming to the point where I need to sharpen my math skills too man. With the help of technology though, lol.

Do any of you guys regularly use physical financial calculators? I was given an HP 12c calculator ... I barely know how to use it though.

 

[Charnell]

I do not use a finance calculator, but you might be able to find a few useful things in the links below

http://bookboon.com/en/accounting-and-finance-ebooks
A free ebook website with all kinds of subjects covered

https://www.khanacademy.org/
Touch up on those math skills

https://www.udemy.com/accounting-in-60-minutes-a-brief-introduction/
I haven't taken this course, but you might find it useful

 

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[smarty]

I hope it was a troll anyway. http://bit.ly/15hbmql

 

[DeletedUser394]

Thanks for the responses guys.

I picked some simple numbers because I was looking for the principle behind the calculation, which a few people shared which is great.

The actual numbers aren't easily divisible, but now I know how to do it

Thanks again!

 

[pickeringmt]

The actual numbers aren't easily divisible

Dude, you are killing me
windows has a calculator built right in to it
the buttons are all about the same difficulty to push

 

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[Charnell]

It's time to touch up on the mathematics. Go to khanacademy and do their algebra course.

 

[DeletedUser394]

Dude, you are killing me
windows has a calculator built right in to it
the buttons are all about the same difficulty to push

You're both misunderstanding me.

I know exactly how to do the calculations now.

My point was that the original numbers I picked above are easy enough to figure out in your head just by looking at it (assuming one knows the proper calculation). That's why they were chosen to be used as examples.

That's it.

 

[pickeringmt]

You're both misunderstanding me.

I know exactly how to do the calculations now.

My point was that the original numbers I picked above are easy enough to figure out in your head just by looking at it (assuming one knows the proper calculation). That's why they were chosen to be used as examples.

That's it.

I know man, im just giving you a hard time

Now if you'll excuse me, I have to go start a thread asking what Facebook is

 

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[jon.a]

I had the same problem. I got 5k but I couldn't show my work. Used to really piss off my teachers.

 

[Daniel A]

I had to share this. I use imgur.com for my art class (more boring than I expected) and just when I was about to log in -- I see this trending image on the home page. Lol

http://imgur.com/gallery/VpU238j

Look at the comments. We're not alone! :joyful:

 

[DeletedUser394]

I had to share this. I use imgur.com for my art class (more boring than I expected) and just when I was about to log in -- I see this trending image on the home page. Lol

http://imgur.com/gallery/VpU238j

Look at the comments. We're not alone! :joyful:

haha nice man.

I actually use a calculator for even the simplest calculations when doing my accounting. I'll do it in my head, but need to confirm with a calculator before inputting orders/financials.

Got to keep the ego in check occasionally so it doesn't interfere with the money game.

 

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[Daniel A]

Got to keep the ego in check

Quoting the post's top comment:

"I am guilty of this"

 

[Durete]

I actually use a calculator for even the simplest calculations when doing my accounting. I'll do it in my head, but need to confirm with a calculator before inputting orders/financials.

Same here...
Calculating everything in my head first, to keep the mind sharp.
But since it's money and not even $0.01 can be off, gotta double check it with a calculator..

 

[Yasai]

Pssh... silly fastlaners.
Everybody knows calculators are only useful for one thing: Typing the word "BOOBS" and giggling ("BOOBIES" if you're really high level).

Oh and be glad you don't have to use this one:

(Would keep you on your toes, though.)

 

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[RazorCut]

It is easy to forget here that Math (US) and Maths (UK) don't come easy to everyone. Also I would imagine the average IQ on this site has to be quite a bit higher than the general populous simply because of the type of people it mainly attracts so a good place to ask questions.

@RichKid could have tried to find out via Google (but probably didn't know how to word the search query) or gone to some math forum and asked but he chose to post on a forum he has been a long-term contributing member of and ask his peers. I think that's commendable myself and certainly nothing to chastise over or make fun of.

Asking questions we don't know the answer of is how we learn. To me that shows intelligence and commitment to development.

 

[GravyBoat]

It's coming to the point where I need to sharpen my math skills too man. With the help of technology though, lol.

Sadly, I am in the same boat. Use it or lose it I guess, I don't need to do much math in my day to day activities. I was helping this girl with her calc and algebra homework last week and I was literally lost. I felt like such a dumbass.

 

[mt_myke]

...and this is exactly why I registered remedialfinance.com years ago (but still haven't put up a site). Simple math is not so simple. It's shocking how often percentages are misused, for example. 150 is a 50% increase/gain from 100, but 150% of 100 - I see this get messed up all the time when people compare quantities (sales, stock prices, etc) over time ("sales are up 50% from last year" vs "sales are 150% of last year's results"). Also, going from 150 back down to 100 is only a 33.3% decrease, NOT a 50% decrease. The percentage change from A to B is different than the percentage change from B to A. I see people using the same percentage both directions as if it were the same as adding or subtracting a number.

I have at least a dozen good ideas for articles for this site, and it's a pretty unique angle I haven't seen anywhere else. If anyone can come up with a good way to monetize it (ads won't cut it, and I'm not sure how to make an ebook if everything is already on the site) I'll do it, that's been the only thing stopping me.

 

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[Mattie]

Hey there's a business math class at a college near you. Take one!

 

[mt_myke]

Hey there's a business math class at a college near you. Take one!

And online classes...and I just realized I could do a paid class at one of the many sites set up for that.

 

[Mattie]

Yes online works too!

 

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[Daniel A]

@GravyBoat I was looking...and I might start doing some relevant Khan Academy modules during the Winter. Most of my future college classes will involve a lot of math so I need to prepare for that. I just need to be more efficient if I actually plan to stick with more studying (just so much, lol).

Use it or lose it. It applies to so many things, but definitely applies to cognitive performance and memory. Haha! Don't feel bad. The best option then is to practice the practical math.

@mt_myke I very recently tweeted to lynda.com's Twitter account suggesting they make a course on how to use the most popular financial calculators. If you know how and are willing to teach, emailing them about it might be a good idea. The person behind their Twitter account said they'd share my feedback with the team, so they will most likely be looking for people to make the course.

 

[Mattie]

I always hated math. In college they made me take four math classes, and now I see it actually helps you be a critical think and problem solver. It stretches your brain more than one way. I literally hated it. Just glad those days are over.

 

[Daniel A]

Just glad those days are over.

They won't be over for me anytime soon...

 

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[Ninjakid]

It's true, I actually do love math.

 

[GuestUser112]

I have at least a dozen good ideas for articles for this site, and it's a pretty unique angle I haven't seen anywhere else. If anyone can come up with a good way to monetize it (ads won't cut it, and I'm not sure how to make an ebook if everything is already on the site) I'll do it, that's been the only thing stopping me.

Why won't ads cut it? You could advertise for universities, colleges, etc.

An ebook might work if you focus on 'neuroplasticity' and talk about how doing different exercises will help the 'logical' side of your brain. Then just fill up a bunch of printable worksheets with math equations like a Kumon book for adults. You're basically competing with every company in the education industry though so if you want to make money you gotta be serious about it.

For a niche like 'improving basic math', you would probably have good luck if you made it relevant, as in addressing these needs:

• calculating mortgage
• calculating grocery bill
• calculating energy usage (put up generic figures for refrigerators, computers, etc)
• calculating gasoline bill (vehicle mileage, price of gas, miles per day)

Just off the top of my head anyway. Might not be worth it, I don't know.