考點:百分數(shù)的加減乘除運算
專題:文字敘述題
分析:設乙數(shù)是1,先把乙數(shù)看成單位“1”,甲數(shù)就是乙數(shù)的(1-25%),由此用乘法求出甲數(shù);再把丙數(shù)看成單位“1”,它的(1+25%)對應的數(shù)量是乙數(shù),由此用除法求出丙數(shù);再用甲數(shù)除以丙數(shù)即可.
解答:
解:設乙數(shù)是1,那么甲數(shù)是:
1×(1-25%)=0.75;
丙數(shù)是:
1÷(1+25%)=0.8;
0.75÷0.8=93.75%;
答:甲是丙的93.75%.
故答案為:93.75.
點評:解答此題的關鍵是分清兩個單位“1”的區(qū)別,找清各自以誰為標準,再把數(shù)據(jù)設出,根據(jù)數(shù)量關系求解.