问题
单项选择题
The promoters of the Springfield music festival estimated a 50 percent increase in ticket sales from last year, but because of bad weather, ticket sales actually decreased by 25 percent from last year’s level. What percent of the projected ticket sales were the actual ticket sales ？（）
A. 45
B. 50
C. 55
D. 65
E. 75
答案
参考答案：B
解析：
If last year’s sales were S, the projected sales were 1.5S, and actual sales were 0.75S. 0.75S/1.5S=0.5=50%.