发布网友
共1个回答
热心网友
1-20%=80%,
(1-80%)÷80%,
=20%÷80%,
=25%;
故答案为:25%.
热心网友
1-20%=80%,
(1-80%)÷80%,
=20%÷80%,
=25%;
故答案为:25%.