There’s a better way: First, determine how much effort you spent—whether that was time spent, number of posts, or amount of money spent on a campaign, the investment must be defined. For the returns, you need a numerical value, such as number of likes or the number of people referred to your webpage. Once you figure out what to measure, then you can perform a ratio calculation. The number might not be as convenient as the traditional ROI formula, but it will give you a base to work with.