Euro-British Pound. How would the call option premium change on the right to buy pounds with euros if the euro interest rate changed to 4.187.1% from the initial values fisted in this table The cat option on British poundt, if the euro intorest rate changed to 4.1871% , would be f L . (Round to four decimal places.) Data table (Click on the following icon in order to copy its contents into a spreadsheet.) Data table.