not sure why i am getting this wrong. 11.87 and 11.88 are not correct. please help

Required: Mr. James K. Silber, an avid international investor, just sold a share of Nestle, a Swiss firm, for SF5,350. The share was bought for SF4,690 a year ago. The exchange rate is SF2.05 per U.S. dollar now and was SF1,96 per dollar a year ago. Mr. Silber received SF138 as a cash dividend immediately before the share was sold. Suppose that Mr. Silber sold SF4,690, his principal investrment amount. forward at the forward exchange rate of SF2.07 per dollar. How would this affect the dollar rate of return on this Swiss stock investment? Note: Do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal places