Answer
grade $\approx 8.33\%$
Work Step by Step
The slope of the ramp is the quotient of the rise and the run:
slope = $\dfrac{1}{12}$
To express the slope as a grade, convert the slope to percent:
grade = $\dfrac{1}{12}=0.08\overline{3} = 0.08\overline{3} \times 100\%\approx 8.33\%$
