(1)(160+180+200+240)÷12,
=780÷12,
=65(万元);
(2)(240-160)÷160,
=80÷160,
=50%;
(3)我们把160看做200,
180看做200,
240看做200,
所以就有200+200+200+200,
=800(万元);
故答案为:65,50,800.
(1)(160+180+200+240)÷12,
=780÷12,
=65(万元);
(2)(240-160)÷160,
=80÷160,
=50%;
(3)我们把160看做200,
180看做200,
240看做200,
所以就有200+200+200+200,
=800(万元);
故答案为:65,50,800.