甲數(shù)與乙數(shù)的比是5:7,乙數(shù)比甲數(shù)多________%.
40
分析:根據(jù)“甲數(shù)與乙數(shù)的比是5:7”,得出甲數(shù)是5份,乙數(shù)是4份,甲數(shù)比乙數(shù)多兩份,求乙數(shù)比甲數(shù)多百分之幾,是求多的數(shù)占甲數(shù)的百分之幾,用除法計算,多的數(shù)除以甲數(shù).
解答:甲數(shù)比乙數(shù)多:7-5=2份,
乙數(shù)比甲數(shù)多百分之幾:2÷5,
=0.4,
=40%.
答;乙數(shù)比甲數(shù)多40%.
故答案為:40.
點評:此題考查百分數(shù)的實際應用,解決此題的關鍵是求一個數(shù)比另一個數(shù)多百分之幾,用多的數(shù)除以另一個數(shù)(標準量).