"Percent Slope" is a representation that uses the ratio between the rise and run to describe the triangle formed. "Degree slope" is the measure of the angle formed
http://wiki.answers.com/Q/How_do_you_convert_a_slo...

1. Divide the slope expressed as a percentage by 100 to convert to a standard slope. For example, if your slope expressed as a percent equals 70 percent, divide 70 by 100 to get 0.7
http://www.ehow.com/how_8648364_convertpercentsl...

In the equation y=mx+c, the slope of the line is given by 'm' And hence you're right about the slope being 0.7704. And when converting this to a percentage, all that is required is
http://answers.yahoo.com/question/index?qid=201106...

3.5 degrees is 6.1 percent slope. Percent slope equals the rise divided by
http://www.chacha.com/question/whatis3.5degrees...
