I calculated the Slope of the area that I'm working on, and I was wondering if there is a way to calculate the actual percentage of each bracket, meaning the percentage of contribution of each class. The Slope is a floating point type of file and I cant convert it to polygon. Any advice could be helpful.
You can use Reclassify tool to reclassify your slope raster into the ranges you want. The Reclassify tool exists in ArcToolbox -> Spatial Analyst Tools -> Reclass -> Reclassify.
When you run the Reclassify tool, you need to rearrange the cell values as the following (the original slope values may look different in your case):
The output reclassified raster will as follows:
When you open the attribute table you will have three columns: OID, Value, and Count. Right-click the Count Column and go to Statistics:
Look at the sum, this is the total number of cells with values:
Copy the Sum value, then add a new column of type Double, name it Percent,and calculate the percentage of each class using Field Calculator: