The crazy trucker's answer to the grade question by: the crazy trucker
Welcome to life as a trucker Jac!
Sorry it took me so long to get back to your question. Just got down from Texas and my air conditioner went out so I really didn't want to be messing with this hot laptop. I am up in Va now so its more comfortable (yes my air oonditioner is still broke for a couple of days)
A grade is what the measurement of the hill, slope or mountain side is called.
They get that measurement by dividing the height of the incline by the length of the incline then multiply by one hundred to get the percentage.