The spot rate today of the Swiss franc $($SF$)$ in dollars is $$0\mathrm{.}40/$SF$.$ The spot rate of the Mexican peso $($MP$)$ in dollar is $$0\mathrm{.}20/$MP$.$ Suppose that a forecaster predicts that the dollar will appreciate $20\%$ against the peso and depreciate $20\%$ against Swiss franc. What percentage appreciation or deprecation is the forecaster predicting for the franc in terms of pesos $($what percent change in the MP$/$SF exchange rate is he predicting$)?$