Why do I specify a percentage for a class category and class code combination?

If you can associate multiple class codes with a class category, then specifying a percentage enables you to create reports based on relative values for each code.

For example, you specify a class category Funding Source on your project. With this category, you select two class codes: Private and Federal. If you assign 30 percent to Private and 70 percent to Federal, then you indicate the proportion of funding received for your project from the two sources.