calcuting what an extra 30% is???

Caporegime
Joined
1 Dec 2010
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Welling, London
I’m absolutely rubbish at maths so I have to use a dunces method of just taking 10% of the figure (which is the simplest percentage of all) and just multiplying it by the percentage I’m after, so basically with £50, I would just multiply 5X3 to get 15.add it on and done.
 
Soldato
Joined
25 Jul 2010
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Worcestershire
Margin and markup are different, important to remember.

If something costs you £100 and you sell it for £130, the markup is 30% (30/100) but the margin is ~23% (30/130).
 
Caporegime
Joined
23 Apr 2014
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Dominating rooms with symmetry
Yeah for percentages in tens I do it as 10% then multiply to get the number. Even if it’s not in tens it’s easy to break it up into tens then single digits and add.

I’ve seen some horrific ways of doing percentages over the years, even from people who you wouldn’t suspect.
 
Soldato
Joined
18 Oct 2002
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3,506
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UK
I hope the person you’re discussing this with doesn’t work in any capacity that requires them to do pricing if they don’t know their basic markup and margin formulas!
 
Associate
Joined
6 Sep 2005
Posts
459
Location
West Sussex
To increase a set value of by 30% just multiply by 1.3.
However, cost/margin is the method i'd use for marking up goods - 21.42 is the 30% profit margin from the sell price of 71.42 without tax.
 
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