Well, using a weight tape, she weighs about 360 kgs... 20% of that = 72 kg. Would that be including the saddle and everything?
I know some saddles are quite heavy - mine's gotta weigh something like 8 kg. But that's ok, because I weigh just over 50kg and even if my saddle and riding equipment weighs 10 kg, its still only around 60 ish kg that she's carrying.
The reason I ask this is that my brother was wanting to ride her... I don't really want him to lol he's hardly ridden at all and my horse is a bit iffy with beginner riders. He's probably borderline too heavy because he's around 65kg and if the saddle and stuff is 10kg = 75kg. So would be too much for her as 20% is 72 kg. Yay, hehe now I have a good excuse :P