T/O MAC in 744

[littlejet]

If the T/O MAC in L.S. appears to be, say 22.5 %, what should you enter in the FMC 22% or 23% since it will accept only round figures. And why?
Thnx

[Rainboe]

It doesn't matter. It makes such a minor difference to the trim it is of no consequence. What does matter is that both pilots satisfy themselves that 22 or 23% has been entered correctly. It is all done on estimated approximate baggage/people weights anyway, it is over-striving for theoretical accuracy to specify one or the other.