比15少20%的数是_;_比25多15%.
问题描述:
比15少20%的数是______;______比25多15%.
答
(1)15×(1-20%),
=15×80%,
=12;
(2)25×(1+15%),
=25×115%,
=28.75;
故答案为:12,28.75.