[QUOTE=Daybreak;2304058]
Quote Originally Posted by Deadeye View Post
you're correctly measuring the grade in degrees, but the OP measured the grade as a percentage. a 7" rise on 11" run expressed in percent is (7/11)x100 or 63.6%[/QUOTE}

Deadeye you have correctly IMO calculated the grade using the horizontal run. The last time I checked the OP calculated using the angled run of trail not the horizontal run. (However this seems to be more popular.) For the staircase example this would be the length of hypotenuse, The angled run would equal the sqrt( (7x7) + (11x11)) =13.0 rather than 11. Y'all can do the rest.
Point taken, thank you.