Movements in Cross-Exchange Rates. Last year a dollar was equal to 7 Swedish kronor, and a Polish zloty was equal to $.40. Today, the dollar is equal to 8 Swedish kronor, and a Polish zloty is equal to $.44. By what percentage did the cross-exchange rate of the Polish zloty in Swedish kronor (that is, the number of kronor that can be purchased with one zloty) change over the last year?