4 3/7×8 4/9-4 3/7×6 4/9

1) 4 3/7*8 4/9=31/7*76/9=2356/63=37 25/63 2)4 3/7*6 4/9=31/9*58/9=1798/81=16/81 3)2356/63-16/81=(190836-1008)/5103=189828/5103=37 1017/5103=37 339/1701=37 113/567