 Hello, in this video we are going to calculate the percentage of land cover per subcatchment. Let's open the attribute table and see what we have until now. We have a field with the catchment area that we have calculated before. Let's open the field calculator to calculate now the surface area of each feature that we have in the subcatchments. And these are the class area. So we call it class area, it's a decimal number. And we simply use dollar area again that we used before. Click OK and now we have the surface area of each feature. Now we can calculate the percentage. In the field calculator create a new field, call it percentage, it's also a decimal number. Open a bracket, go to fields and values, double click on the class area and divide it by the catchment area, close to brackets and times 100. In the preview we can see already the percentage. Click OK and the new field with percentage is added reflecting the surface area of each land cover class per subcatchment area. Now we can also add the class names to complete this. Call the field land cover and change it to text string and we use the case when function. When level 1 equals 1 then give as a string the class name artificial surfaces. So remember we use single quotes for strings and we do the same for the other classes. Case when function ends with the end statement. Don't forget to increase the output field length, we use 40 here to have enough space for the class names and click OK. And here we see the class names now added in the land cover field. Toggle off the editing and save the changes. So in this video you've learned to calculate the percentage of land cover per subcatchment area and to add the land cover names to the attribute table.