Math CentralQuandaries & Queries


Question from Julie:

Hi - I'm trying to figure out what my ROI ( Return on my investment) is for a particular product I purchased. My investment cost was $4100 and my savings as a result of this investment was $34,170. How can I figure out what my ROI was on this product. Thanks much for your help!

Hi Julie,

Investopedia says that


In your case I get

ROI = (34170 - 4100)/4100 = 7.3342

The examples I have seen express this as a percentage so I would multiply by 100 and say ROI = 733.42%.


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