1.(28-14)/28*100%=50%比中国少50%2.(28+16+15-14-17-26)/(14+17+26)*100%=3.51%比德国多3.51%
1. (28-14)/28=0.5=1/22. (28+16+15-14-17-26)/(14+17+26)=2/57
解:(28-14)/28=1/2;【(28+16+15)-(14+17+26)】/(14+17+26)=2/57