问题
单项选择题
An investor bought 200 shares of stock in ABCD company in 1990. By 1992, the investment was worth only 
of its original value. By 1995, the 200 shares were worth only 
of their value in 1990. By what percent did the value of the investment drop from 1992 to 1995 ？（）
A.A
B.B
C.C
D.D
E.E
答案
参考答案：B
解析：
This may be easiest to approach by plugging in actual values. If the 200 shares were worth $300 in 1990, then they were worth only $200 in 1992 (2/3) and $150 in 1995 (1/2). A loss of $50 from $200 is a 25% drop.