Question

楊樹(shù)的棵樹(shù)比柳樹(shù)的棵樹(shù)多20%，柳樹(shù)的棵樹(shù)比楊樹(shù)的棵樹(shù)少百分之幾？

Answer 1

考點(diǎn)：百分?jǐn)?shù)的實(shí)際應(yīng)用

專題：分?jǐn)?shù)百分?jǐn)?shù)應(yīng)用題

分析：把柳樹(shù)棵數(shù)看作單位“1”，楊樹(shù)的棵樹(shù)比柳樹(shù)的棵樹(shù)多20%，那么楊樹(shù)棵數(shù)就是1+20%=120%，用柳樹(shù)的棵樹(shù)比楊樹(shù)的棵樹(shù)少的棵數(shù)除以楊樹(shù)棵數(shù)即可解答．

解答： 解：20%÷（1+20%）
=20%÷120%
=16.7%
答：柳樹(shù)的棵樹(shù)比楊樹(shù)的棵樹(shù)少16.7%．

點(diǎn)評(píng)：明確標(biāo)準(zhǔn)量，并能根據(jù)要求的問(wèn)題和標(biāo)準(zhǔn)量之間關(guān)系正確列式解答，是本題考查知識(shí)點(diǎn)．