Final answer:
To find the grade of the road as a percent, divide the vertical change (rise) by the horizontal change (run), then multiply the result by 100%. Without the rise and run values, the calculation cannot be completed.
Step-by-step explanation:
The question asks to calculate the grade of a road, which is done by determining the slope of that road and expressing it as a percentage. To find the slope (grade), you would typically divide the rise (vertical change) by the run (horizontal change) of the road. Therefore, you need to know these values before proceeding with the calculation.
To calculate the grade of the road expressed as a percent, the formula you would use is: grade percentage = (rise/run) × 100%. After calculating the division to find the decimal value, you then convert the decimal to a percentage. If the rise is not provided in the question, then we are unable to provide a numerical answer.
To convert a decimal to a percent, write the decimal as a fraction. If the denominator of the fraction is not 100, convert it to a fraction with a denominator of 100, and then write the fraction as a percent.