Q8:ds

In 1997 there were 300 female employees at company C, if the number of female employees increased by 60% from 1997 to 1987, by what percent did the number of female employees at company C increased from 1987 to 1997?

1) from 1977 to 1997, the number of female employees in company C increased by 200%;

2) in 1977 there were 100 female employees at company C.

答案：D

经大家讨论后是提干有问题。

我的疑问是：1 increase to和increase by的区别？

2 the number of female employees increased by 60% from 1997 to 1987

的意思是：female97/female98=1+60%

the number of female employees at company C increased from 1987 to 1997

的意思是：1-female87/female97 （这里也有个小问题，为什么上句还用increase,应该是decrease吧！）

是这样吗？想确定一下！总是不知道什么做分母！：）

先谢谢xdjm,nn,盼解答！：）