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pyx_e
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PostPosted: 11:04 - 29 Apr 2009    Post subject: %'s Reply with quote

What is the formula for expressing one number as a percentage of another?

e.g. What percentage of 23 is 16.5? a nice simple formula would be good I have about a dozen of these to work out and I have forgotten my GCSE Maths from 30 years ago. Not that I was any good to start with. 5 goes to get a Grade 1, sigh.
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zephyrgirl
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PostPosted: 11:09 - 29 Apr 2009    Post subject: Reply with quote

16.5 divided by 23 = 0.717
Then multiply 0.717 by 100 to get your percentage.

So 16.5 is 71.7% of 23.
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Last edited by zephyrgirl on 11:11 - 29 Apr 2009; edited 2 times in total
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chrisw
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PostPosted: 11:10 - 29 Apr 2009    Post subject: Reply with quote

Not sure it's the simpliest way but I'd do it like so:

=16.5/(23/100)
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SlimRick
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PostPosted: 11:11 - 29 Apr 2009    Post subject: Reply with quote

(16.5/23)x100
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Fawbish
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PostPosted: 13:12 - 29 Apr 2009    Post subject: Reply with quote

You want


(x/y)*100=%


X is the number whose percentage of Y you are trying to find. It works both ways.


So (15/20)*100 = 15 is 75% of 20.

And (20/15)*100 = 20 is 133% of 15.

HTH Thumbs Up
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Skudd
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PostPosted: 13:23 - 29 Apr 2009    Post subject: Reply with quote

I have forgotten how to do formula in XL. I know it is just a click away but for the life of me I can't remember which click.
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daemonoid
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PostPosted: 13:28 - 29 Apr 2009    Post subject: Reply with quote

=
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Fawbish
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PostPosted: 13:28 - 29 Apr 2009    Post subject: Reply with quote

Meh, forget clicks Skudd.


Its a little long winded, but obvs if only simple formulas, you can copy paste etc


=sum((E17*D14)*100)/10000)


^everythng after =sum can be interchanged, as long as the correct bracketry is there.


Thats the schoolboy version tbh, you can simply put =+ also, does the same thing.


Should be able to find a guide on Excel formulae with Google.

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Wow Im in a rambling mood.

= is like, fine. Laughing
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Skudd
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PostPosted: 13:42 - 29 Apr 2009    Post subject: Reply with quote

Fawbish wrote:



=sum((E17*D14)*100)/10000)




Thats the little bugger. =sum

I'm sure there was an icon for it on the bar. never mind.

cheers Thumbs Up
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oldpink
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PostPosted: 14:48 - 29 Apr 2009    Post subject: Reply with quote

to do the sum of in excel its the icon on the menu that looks like a greek letter E
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pyx_e
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PostPosted: 15:59 - 29 Apr 2009    Post subject: Reply with quote

zephyrgirl wrote:
16.5 divided by 23 = 0.717
Then multiply 0.717 by 100 to get your percentage.

So 16.5 is 71.7% of 23.


Ta Karma
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ncrn
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PostPosted: 17:25 - 29 Apr 2009    Post subject: Reply with quote

oldpink wrote:
to do the sum of in excel its the icon on the menu that looks like a greek letter E


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LankyPaddy
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PostPosted: 20:00 - 29 Apr 2009    Post subject: Reply with quote

Stage 2 of %'age for beginners - show how the 2.5% VAT rate reduction doesn't equate to a 2.5% discount...
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yuri2085
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PostPosted: 20:20 - 29 Apr 2009    Post subject: Reply with quote

100 + 17.5% = 117.5
100 + 15% = 115 (this is VAT lowered by 2.5%)


117.5-115 = 2.5 (difference between them)

2.5/117.5 = 0.021 x=2.1% price reduction.


Do I win? :o
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ms51ves3
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PostPosted: 20:34 - 29 Apr 2009    Post subject: Reply with quote

yuri2085 wrote:
100 + 17.5% = 117.5
100 + 15% = 115 (this is VAT lowered by 2.5%)


117.5-115 = 2.5 (difference between them)

2.5/117.5 = 0.021 x=2.1% price reduction.


Do I win? :o


That's a weird way of doing it.

I would do (Price including VAT/117.5%)*2.5

Then deduct the answer away from the price including VAT.

Example: £19.99/117.5% = 0.170
0.170*2.5 = 0.425 or 43p when rounded up.
So the new price would be £19.57
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LankyPaddy
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PostPosted: 20:41 - 29 Apr 2009    Post subject: Reply with quote

You win a delicious internet cookie, Yuri gets first bite as he showed the 2.1% reduction Razz

I could've been a school teacher Wink
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kawashima
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PostPosted: 01:11 - 30 Apr 2009    Post subject: Reply with quote

Another excel quiz.
What is a formula in excel for "the cube root of 27"?
---
Answer is =27^(1/3)
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