标题: 固定小数与百分比 [打印本页] 作者: Herbert 时间: 2003-8-6 23:16 标题: 固定小数与百分比
82.M/N的结果是有固定位数的小数吗
a) M=160
b) N=250
[确认] B
固定小数是什么概念?
19. In 1989, the persons who have a computer at home is 40% of the total population. In 1990, the % of those who has computer at home increased by 30% as compared to 1989. The population increase by 4%. What is the % of people who has computers in 1990?
[讨论]: 52%
我的答案:0.4*1.3/(1+4%)=50%作者: cxm1127 时间: 2003-8-6 23:42