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Posted by usenet+2004 on 09/01/06 08:19
universalbitmapper:
> I'm looking for the formula to compute the original variable after it
> has been applied VAT.
> For instance 100 + 18% -> 118.
> But if I try to find out 100 from 118 - 18%, the result is greater than
> 100.
Yes, because 18 % of 118 is greater than 18 % of 100, so 118 minus 18 %
of 118 is over 100.
Given your figures, you are trying to find x in
118/x = 118/100
that is, your figure after tax (118) divided by your figure before tax
(x) equals your tax rate(118 % not 18 %) divided by 100.
Multiplying both sides by 100,
=> 11800/x = 118
=> 118x = 11800
=> x = 100
ObOT: "Standard" VAT in the UK is 17.5 %, no?
--
Jock
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