Problem
A road has a grade of 15 degrees. Convert this grade to a percent grade.
Solution
Step 1 ：Step 1: We know the tangent of the angle equals the rise over the run, which is the definition of a percent grade. So, we need to find \(\tan(15^\circ)\).
Step 2 ：Step 2: Use a calculator to find \(\tan(15^\circ)\).
Step 3 ：Step 3: Convert the decimal to a percent by multiplying by 100.
