`-3,2 . (-15)/64 + (0,8-2 2/15) : 3 2/3`
`=-16/5 . (-15)/64 + (4/5-32/15) : 11/3`
`=3/4 +(-4/3)xx3/11`
`=3/4 -4/11`
`=17/33`
`0,05 . 60% + (2 1/3 - 3/2): 0,7-3 1/2`
`=1/20 . 3/5 + (7/3 - 3/2): 7/10-7/2`
`=3/100+ 5/6* 10/7-7/2`
`=3/100+25/21-7/2`
`=123413/2100`