How to determine the value of the US dollar changed against the Euro (Euro / US$) - i couldnt figure out using the cross exchange rate

1. 6375 USD A year ago, you observed that the US dollar was valued at 1.36 while the Euro was valued at 1.08. Today, the US dollar is valued at 1.71 and the Euro is worth 1.03. Determine the value of the US dollar changed against the Euro (Euro/US$) in percentage over the last year. (enter 2 decimal places number with no sign or symbol) Answer: X 27 The correct answer is: 31.84 0 . 9701 10 60 USD