You can purchase a share of stock in Peru for 50 Peruvian sol. The stock typically pays a 5 sol per share dividend and you expect it will trade in 1 years' time at 60 sol. Assume the current spot rate for 1 US dollar is 4 sol and the dollar is expected to rise to 5 sol in a years' time. The expected net return on Peruvian stock(assuming it is sold ex-dividend) expressed in terms of US dollars is ___%?