Please help me asap! And also if you could show steps so that I could learn how to do it that would be awesome. Thank you!

For questions 20-22, your total portfolio consists of the following holdings: a) 1,000 shares of Redneck Bank worth $235 per share b) 500 shares of The Belching Toad Brewery worth $145 per share c) 700 shares of Espresso Patronum Coffee Co worth $97 per share 21 Over the course of the last year, Redneck Bank was down 5%, Belching Toad was up 7.5%, and Espresso Patronum was up 25%. What was your portfolio total return (%)? (answer in %, to two decimal places, i.e. xx.xx)