NO.PZ2016010801000108
问题如下：
Over the last year, the GBP to Euro exchange rate has increased from GBP/EUR 0.8878 to GBP/EUR 0.9144. It indicates that:
选项：
A.The Euro has depreciated by 2.91%, and the GBP has appreciated by 3.0%.
B.The Euro has appreciated by 2.91%, and the GBP has depreciated by 3.0%.
C.The Euro has appreciated by 3.0%, and the GBP has depreciated by 2.91%.
解释：
The EUR has appreciated: (0.9144-0.8878)/0.8878=3%.
As for GBP, first convert the exchange rate to EUR/GBP: 1/0.8878=1.1264, 1/0.9144=1.0936. The GBP has depreciated by (1.0936-1.1264)/1.1264=-2.91%
考点：外汇升值与贬值的计算。
解析：欧元升值:(0.9144-0.8878)/0.8878=3%。
至于英镑，首先将汇率换算成欧元/英镑:1/0.8878=1.1264,1/0.9144=1.0936。英镑贬值(1.0936-1.1264)/1.1264=-2.91%
请问为什么B不对？base货币计算不可知直接用题中的数字计算吗？
