To figure grade at one point. Use a 4' level and the # of inches from the street to the
bottom of the level (with the bubble leveled) divided by 48 = % slope.

If it is 4" from the street to the bottom of the level your equation is: 4/48 = .08333 which
would be 8.3% slope.

If you are using a 2' level you would divide by 24