When reading data about fuel burn, it looks like the data is quoted by reference to two variables:
Best economy or best power
and
% power
For example:
For best economy cruise:
8.5 GPH at 75% power
7.5 GPH at 65% power
6.6 GPH at 55% power
For best power:
10.0 GPH at 75% power
8.8 GPH at 65% power
7.8 GPH at 55% power
I'm confused because, for any given % power (ie throttle setting), I would have assumed that the net result is either an economy cruise, or a best-power setting, or somewhere between the two. But, I don't see how, for example, a 75% power setting can be applicable to both 'best economy' and 'best power'. I've doubtless got some fundamental misunderstanding here (I'm still a student) which I'd like to clear up.
Thanks as ever for your help.