Percentages are often used to compare
quantities. Like,
the price of RAM dropped 20% since last year, and so on.
This is how one would
calculate percent change between two numbers:
|new value - original value|
% change = ---------------------------- * 100
original value
An Example:
Using a
help desk situation, here is how we would find the percent change between
64 calls per day and 28 calls per day:
|64 - 28|
% change = --------- * 100
64
% change = 56.25%