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.
Your searching for a factor by which the initial value is to be multiplied to obtain the final value. If the initial value is 100 and the rate of change is 500%, the final value will be 600 (100 + 500), and it can be expressed as 600 = 100 * 6, therefore 6 is the grow factor. If the rate of change is -55%, we can perform the same calculation: initial value: 100 rate of change: -55% final value: 100 - 55 = 45 = 100 * 0.45 Therefore, the decay factor is 0.45. For an arbitrary rate of change R (expressed as %), the grow (or decay) factor F will be F = 1 + R/100