0.8:5=4.5x8 4=4.5x8 4-8=4.5x -4=4.5x x=-1.125
0,8:5= 4,5x8 0,16=4,5x *8 0,16=36x 36x=0,16:36 x=0,004
0.8/5=0.2 4.5*8=36