3 Целых 4/7 + 1 целая 2/3
3 4/7+1 2/3=3 12/21+1 14/21=4 26/21=5 5/21
3 4/7 + 1 2/3 = 25/7 + 5/3 =(25 × 3 + 5 × 7)/21 = 75/21 + 35/21 = 110/21 = 5 5/21