Brain block in maths!

S@njay · 29 Dec 2006 at 15:31

I'm trying to work out a percentage, but for some strange reason i cant do it, i feel ashamed, i have a computer science degree under my belt!

I need to work out a percentage of, i.e.

4 of 12 which is 25%.

Apart from me knowing that obvious fact, what formula do you use to get it?

I feel dumb

ArmyofHarmony · 29 Dec 2006 at 15:32

4/12 * 100

wait

what u on about

Eriedor · 29 Dec 2006 at 15:33

S@njay said:
I'm trying to work out a percentage, but for some strange reason i cant do it, i feel ashamed, i have a computer science degree under my belt!

I need to work out a percentage of, i.e.

4 of 12 which is 25%.

Apart from me knowing that obvious fact, what formula do you use to get it?

I feel dumb

Um 4 of 12 is 33.3% :S

(100/12)*4

gumbald · 29 Dec 2006 at 15:33

Am I missing something also? As he said above.

S@njay · 29 Dec 2006 at 15:34

Oh wait, i mean 4 of 16! sorry!

badgermonkey · 29 Dec 2006 at 15:34

Using your example.

4/12 -> Convert it to decimal (in this case 0.33333333)

Multiply the decimal by 100 = 33.333333333(recurring)%

So you got it wrong in your OP

3 is 25% of 12

EDIT: Beaten by 4 people posting

Psypher5 · 29 Dec 2006 at 15:36

i always hated %'s

S@njay · 29 Dec 2006 at 15:38

Cheers guys!

Could have been on the calculator to somehow get 25% from 4 of 12!

(4/16)*100 does indeed = 25!

[noodle] · 29 Dec 2006 at 15:38

Percentages were easy. Surds, however, I hated, and I couldn't get the hang of them. Surds were awful. :mad:

badgermonkey · 29 Dec 2006 at 15:40

[noodle] said:
Percentages were easy. Surds, however, I hated, and I couldn't get the hang of them. Surds were awful.

Surds are easy

Calculus is easy

My maths module in my compputing degree is insultingly easy

I should have done maths at uni

clv101 · 29 Dec 2006 at 15:44

When I was about 8 I learnt percentages like this:

number of questions right / total number of questions (x100 obviously)

So 4 of 16 is 4 questions right / 16 questions = 4/16 = 0.25 (25%)

Solari · 29 Dec 2006 at 15:46

badgermonkey said:
Calculus is easy

The Calculus II module at college for BTEC Electical & Electronic engineering gave me aneurisms :eek:

I can't remember exactly what was the worst part - I think it was maxima and minima on a curve so I got an expensive graphing calculator to check my answers

I've always been good at applied maths for programs etc but when it comes to all this theoretical stuff it does my head in.

badgermonkey · 29 Dec 2006 at 15:49

Solari said:
The Calculus II module at college for BTEC Electical & Electronic engineering gave me aneurisms I can't remember exactly what was the worst part - I think it was maxima and minima on a curve so I got an expensive graphing calculator to check my answers

.

Bah, integrating and differentiating various trig functions was by far the worst

The Pat · 29 Dec 2006 at 18:23

badgermonkey said:
My maths module in my compputing degree is insultingly easy

I should have done maths at uni

Should try doing mine then.

badgermonkey said:
Bah, integrating and differentiating various trig functions was by far the worst

I'm with you on that.

Solari · 29 Dec 2006 at 18:30

badgermonkey said:
Bah, integrating and differentiating various trig functions was by far the worst

Our lecturer at college was an absolute genius and ex Uni-Lecturer. Unfortunately most of the class didn't follow his enthusiasm and extremely complicated examples...

Transposing some of the sodding equations was bad enough, nevermind doing the differentiation

I remember having to work out surface areas of odd objects and some examples of things being dropped from planes and what speed they would reach just before they hit the ground etc... sheesh.

Maths has never been my thing, apart from the odd big of trig, as I used to write a lot of graphics stuff years ago in BASIC when I was a nipper

lordedmond · 29 Dec 2006 at 19:00

it was " J " notation that did my head in. can not remember what the hell it was for now :eek:

Duke · 29 Dec 2006 at 19:01

removed

Solari · 29 Dec 2006 at 19:01

lordedmond said:
it was " J " notation that did my head in. can not remember what the hell it was for now

Imaginary numbers or something.... that's faded from my memory

I think one purpose is for impossible values, eg: something that can't be done normally, eg: a square root of a negative number? I'm sure some boffin will correct my wild guess

DAVEM · 29 Dec 2006 at 19:06

Solari said:
Imaginary numbers or something.... that's faded from my memory I think one purpose is for impossible values, eg: something that can't be done normally, eg: a square root of a negative number? I'm sure some boffin will correct my wild guess

Was going to tell you all about it, then I read the boffin bit

Solari · 29 Dec 2006 at 19:08

DAVEM said:
Was going to tell you all about it, then I read the boffin bit

I wouldn't take boffin as a derogatory term, I used to get called it a lot and my boss calls me super nerd at work despite the fact that I don't have a pony tail and I have a girlfriend :confused:

Go ahead and enlighten my alcohol-damaged brain cells