One of the questions that we commonly ask about data is, how has performance changed over time? This helps us understand how events of decisions affect outcomes. While understanding the relationship between discrete numbers is helpful, it's even more useful to understand the rate of change, or the percentage change over time. The reason why it's important to understand the rate of change is that, while discrete numbers may appear to be increasing, the actual percentage change from year to year may be declining.
In the following example, we will discuss how to graph the amount of remittances over time and we will create a quick table calculation that shows the percent difference: