Question

17．某工廠男職工人數(shù)占全廠職工總數(shù)的20%，男職工人數(shù)比女職工人數(shù)少百分之幾？

Answer 1

分析 首先把全廠職工總數(shù)看作單位“1”，用1減去男職工人數(shù)占全廠職工總數(shù)的百分率，求出女職工人數(shù)占全廠職工總數(shù)的百分之幾；然后用男職工人數(shù)占全廠職工總數(shù)的百分率減去女職工占的百分率，再除以女職工占的百分率，求出男職工人數(shù)比女職工人數(shù)少百分之幾即可．

解答 解：（1-20%-20%）÷（1-20%）
=0.6÷0.8
=0.75
=75%
答：男職工人數(shù)比女職工人數(shù)少75%．

點(diǎn)評(píng) 此題主要考查了百分?jǐn)?shù)的實(shí)際應(yīng)用，要熟練掌握，解答此題的關(guān)鍵是求出女職工人數(shù)占全廠職工總數(shù)的百分之幾．