乙为:x/(1+1/3)=3/4*x丙为:x*(1+1/5)=6/5*x依题意得:x+3/4*x+6/5*x=17700 20x+15x+24x=354000 59x=354000 x=6000所以甲为6000,乙为4500,丙为7200那么丙比乙多:(7200-4500)/4500=3/5