A road has a grade of 12%. What is the angle of this grade in degrees?

Step 1 ：First, we need to understand that percent grade is the ratio of the vertical change to the horizontal change, so it's essentially a tangent of the angle we're looking for.

Step 2 ：So, to find the angle, we need to take the inverse tangent (arctan) of the percent grade (which should be converted to decimal form first). In this case, we have: \(\arctan(0.12)\).

Step 3 ：However, the output of the arctan function is usually in radians, so we need to convert it to degrees. The conversion is done by multiplying the result by \(\frac{180}{\pi}\).

Step 4 ：So, the calculation is: \(\arctan(0.12) \times \frac{180}{\pi}\)