28/33 умножить на 45/98 и поделтьб на 2 целых 3/11
28/33*45/98:2 3/11=6/35
28/33*45/98=28*45/33*98=1260/3234=630/1617=90/231
90/231:2 3/11=90/231:25/11=90/231*11/25=90/525=18/105=6/35
Во вложении.. ↓ ↓
-------------------