how do you calculate investment loss %
Step 1. Subtract your initial investment value from the ending investment value to find the gain or loss. For example, if you want to calculate the total percentage investment return over a five-year period, use the value at the start of the first year and the value at the end of the fifth year.If it started at $8,000 and grew to $10,200, your investment gain is $2,200.or example, if you want to calculate the total percentage investment return over a five-year period, use the value at the start of the first year and the value at the end of the fifth year.