Решить дробь 1 5/11 - 2 2/23 • (1 3/5 - 2 3/4 ) = ?

1 3/5-2 3/4=1-2+3/5-3/4=-1+3/5-3/4=-1+12/20-15/20=-1 3/20
2 2/23*(-1 3/20)=-48/23*23/20=-12/1*1/5=-12/5=-2 2/5
1 5/11-(-2 2/5)=1 5/11+2 2/5=1+2+5/11+2/5=3+25/55+22/55=3+47/55=3 47/55