Use
either the Annex or CAP 697 page 30 which has a better print quality.
Enter
at 2000 NGM……… ZERO wind trip time…... 4.830hrs
25kt head
wind trip time.. 5.150hrs
An
increase of…… 0.330hrs
As
a percentage of the still air time:+ 0.330 x 100 = + 6.85 %
4.830