Mr$.$ James K$.$ Silber, an avid international investor, just sold a share of N$$stle$,$ a Swiss firm, for SF$5,100.$ The share was bought for SF$4,620$ a year ago. The exchange rate is SF$1\mathrm{.}70$ per U$.$S$.$ dollar now and was SF$1\mathrm{.}82$ per dollar a year ago. Mr$.$ Silber received SF$124$ as a cash dividend immediately before the share was sold. Suppose that Mr$.$ Silber sold SF$4,620,$ his principal investment amount, forward at the forward exchange rate of SF$1\mathrm{.}72$ 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.