求救一题,大家看看

xiongxiong88

In a certain voting district, 40 percent of registered voters live in Town A, and the rest live in Town B. In the last election, 70 percent of the registered voters from Town A voted. If equal numbers of registed voters from both town voted, approximately, what percent of the registered voters from Town B voted?

答案是47％

但是不知道如何求出答案的。大家都帮忙看看。谢谢！

sammen

40%*70%*人数=(100%-40%)*X*人数,可以得出结论,X=47%