how to calculate return on investment roi 
the return on investment roi formula is as follows roi current value of investment cost of investment cost of investment begin aligned text roi dfrac text current value of investment text cost of investment text cost of investment end aligned roi cost of investmentcurrent value of investment cost of investment current value of investment refers to the proceeds obtained from the sale of the investment of interest because roi is measured as a percentage it can be easily compared with returns from other investments allowing one to measure a variety of types of investments against one another 