一双皮鞋以八折出售,现价比原价降低了_%;东山村今年早稻比去年增产二成,今年产量是去年的_%.

问题描述:

一双皮鞋以八折出售,现价比原价降低了______%;东山村今年早稻比去年增产二成,今年产量是去年的______%.

现价比原价降低了百分之几:
(1-80%)÷1,
=0.2÷1,
=0.2,
=20%;
答:现价比原价降低了20%.
今年产量是去年的百分之几:
(1+20%)÷1,
=1.2÷1,
=1.2,
=120%.
答:今年产量是去年的120%.
故答案为:20,120.