Operation of WPP[edit] WPP is run prior to compilation (in other words, before even the C preprocessor), and generates a trace message header for each file that it processes (by default this header is filename.tmh, where filename is the name of the processed source file). WPP's understanding of C/C++ syntax is very limited.
Divide the new value by the old value and multiply by 100 to find the absolute relationship between the two values. A process that is similar (but not identical) to the process used to find percent change is that used to find the absolute percentage relationship between the old and new values.
Calculate Percent Change Problem: The population of a particular city increased from 400,000 to 500,000. Determine the percent change in the population. Key Concept: When determining the percentage of change, compare the amount of the change to the original quantity. For this problem, the amount of change was 100,000 people.