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.
Typically we compute the percentage change using the original value. For example, if the price increases from $2,000 to $2,200, then the percentage increase in the price is the change ($2,200 - $2,000) divided by the original amount ($2,000) or a 10 percent increase.