Express the percent grade as a fraction of 100. This method works in any instance where a percentage and its value are given. S Ri R 100 Where S is the percent slope Ri is the rise.
Degrees Tan -1 Slope Percent100 Example.
Percentages may be written as fractions or decimals. Enter 1100 total in the first box and enter 100 in the second box. Degrees Tan -1 43 Calculated out this gives an angle of 2327 degrees. Percentage of Overall Scored Marks Scored Marks Out of Marks A 100.