[GNC-dev] book currency is what ... question mark

Wm wm_o_o_o at yahoo.co.uk
Wed Feb 20 06:36:54 EST 2019

On 15/02/2019 01:44, David Cousens wrote:

I haven't read all the recent list replies yet but I think this sort of 

> If the book currency is USD (or AUD or any other third currency) then the
> currency conversion becomes EUR<->USD<->RUB. The double conversions involved
> to the EUR and RUB may introduce scope for rounding errors to produce
> slightly different results on conversion back.
> It also assumes that EUR->USD-> RUB will give the same result as EUR->RUB.
> Where the exchange rates are good to 6 significant figures, this appears to
> be OK using today's figures
> (https://www.xe.com/currencyconverter):
> 1 EUR=75.3052 roubles
> 1 EUR =1.12958 USD
> 1 USD = 66.6667 RUB => 1 EUR = 75.3054 RUB.

is certainly part of the reason why the TB is going wrong.

Congratulations on your prescience :)

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