把3.2:四分之一化成最简单的整数比是(64:5 ),比值是( 12.8 ).
3.2 :1/4
=16/5 :1/4
=16*4/(5*4) :(1*5)/(4*5)
=64/20 :5/20
=64:5
比值=64/5= 12.8