why dont you do present value of cash inflows divided by initial investment required? when do you know to use npv instead

Lwcupe.edu/d21e/content/2697947/ViewContent/20156420/View 9) The management of Leitheiser Corporation is considering a project that would require an initial investment of $48,000. No other cash outflows would be required. The present value of the cash inflows would be $68,330. The profitability index of the project is closest to (Ignore income taxes.): A) 0.58 B) 0.30 C) 0.42 D) 1.42 518 fe to search DLL w S D F G