洗衣机980元,风扇326元,电视机3480元,冰箱2668元,（1）冰箱比风扇贵百分之几?（2）洗衣机比电视便宜

(2668-326)÷326X100%
=2342÷326X100%
=7.184X100%
=718.4%
冰箱比风扇贵百分之718.4
洗衣机比电视便宜百分之71.8
(3480-980)÷3480X100%
=2500÷3480X100%
=0.718X100%
=71.8%