how is percentage change used in finance 
percentage change is often used by investors to track the increase or decrease in the value of a security over time and then compare that against the performance of a relevant index it is also used to compare the changing values of different national currencies as well as to measure the appreciation of physical assets like real estate the bottom linepercentage change is a simple calculation with many uses in finance and business if investors want a quick read on how a particular investment of theirs is performing comparing its percentage change to that of similar investments over the same time period will provide it 