Вычислите 0,8(3)- 0,4(6)\0,(3)

0,8(3)=(83-8)/90=75/90=5/60,4(6)=(46-4)/90=42/90=7/150,(3)=3/9=1/35/6-7/15:1/3=5/6-7/5=25/30-42/30= -17/30 = -0,5(6)