Answer:
ROI is 75% .
Step-by-step explanation:
Formula
[tex]ROI = \frac{(Final\ value\ of\ investment-Initial\ value\ of\ investment)\times 100}{Initial\ value\ of\ investment}[/tex]
As given
Andrew invested $20,000 in mutual funds and received a sum of $35,000 at the end of the investment period.
Final value of investment = $35000
Initial value of investment = $20000
Put all the values in the formula
[tex]ROI = \frac{(35000-20000)\times 100}{20000}[/tex]
[tex]ROI = \frac{15000\times 100}{20000}[/tex]
[tex]ROI = \frac{1500000}{20000}[/tex]
ROI = 75%
Therefore ROI is 75% .
