(1/15)/(1/20)*100%=133.33%133.33%-1=33.33%
一.V甲=1/15 V乙=1/20 1/15/漏芹凳首陵1/20=4/3二返旅.1/15-1/20=1/60
133.33%33.33%
1. 1/15÷1/燃慧20=4/3≈皮谈答133%2.1/15-1/20)÷1/20=1/侍指3≈33%
1/15/孙族明渣(1/20)=4/则槐弊3(1/15-1/20)/(1/20)=1/60/(1/20)=1/3