A
分析:設(shè)乙數(shù)是1,先把乙數(shù)看成單位“1”,用乘法求出它的80%就是甲數(shù);再把丙數(shù)看成單位“1”,它的75%對應(yīng)的數(shù)量是乙數(shù),由此用乘法求出丙數(shù);然后用甲數(shù)除以丙數(shù)就是甲數(shù)是丙數(shù)的百分之幾.
解答:設(shè)乙數(shù)是1,
甲數(shù):1×80%=
;
丙數(shù):1÷75%=
;
=60%;
答:甲數(shù)是丙數(shù)的60%.
故選:A.
點評:解答此題的關(guān)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(shè)出,根據(jù)基本的數(shù)量關(guān)系求解.