NO.PZ2023010401000155
问题如下:
Over the past month, the Swiss Franc (CHF) has depreciated 12% against pound sterling (GBP). How much has the pound sterling appreciated against the Swiss Franc?选项:
A.12%. B.Less than 12%. C.More than 12%.解释:
The appreciation of sterling against the Swiss franc is simply the inverse of the 12% depreciation of the Swiss franc against Sterling: [1/ (1 - 0.12)] - 1 = (1/0.88) - 1 =- 0.1364, or 13.64%
中文解析:
英镑对瑞士法郎的升值与瑞士法郎对英镑贬值12%正好相反:[1/(1 - 0.12)]- 1 =(1/0.88)- 1 =- 0.1364,即13.64%
怎么推导的?