What is ROI?
Return on Investment (ROI) is a metric that determines a ratio between the investment and the gained profit from that investment.
ROI is a performance metric used to assess the efficiency of an investment based on the revenue it has generated.
Calculating ROI
To do this, calculate the return gained from a specific investment and divide it by the investment amount itself.
The result can be interpreted in the form of a ration or percentage and allows an evaluation of the efficiency of the investment.
https://en.wikipedia.org/wiki/Return_on_investment
https://www.investopedia.com/terms/r/returnoninvestment