NO.PZ2023061903000020
问题如下：
Q. An exchange rate between two currencies has increased to 1.4500. If the base currency has appreciated by 8 percent against the price currency, the initial exchange rate between the two currencies was closest to:选项：
A.1.3340. B.1.3426. C.1.5660.解释：
B is correct. The percentage appreciation of the base currency can be calculated by dividing the appreciated exchange rate by the initial exchange rate. In this case, the unknown is the initial exchange rate. The initial exchange is the value of X that satisfies the formula:
1.4500/X = 1.08Solving for X leads to 1.45/1.08 = 1.3426.
基础货币的升值百分比可以通过用升值的汇率除以初始汇率来计算。在这种情况下，未知的是初始汇率。初始交换是满足公式的X值:
1.4500/ x = 1.08
求解X得到1.45/1.08 = 1.3426。
7人民币/美元，变成6.5人民币/美元。
这个是汇率数字下降，但实际上意味着人民币升值。
所以汇率数字和base currency应该是相反的？
