(4 5/12-3 7/18):9,25+5/6=75/153
(0,4+1/8+0,75)*2/3
1)4 5/12-3 7/18=4 15/36-3 14/36=1 1/36
2) 1 1/36:9,25=37/36:925/100=37/36*100/925=1/9
3)1/9+5/6=15/36
4) 0,4+1/8+0,75=1/8+ 1,15=1/8+1 15/100=51/40=1,275
5)51/40*2/3= 17/20
6) 15/36:17/20=15/36*20/17= 75/153