4 2/7 - 1 4/9
8 3/4* 1 3/14
1 9/5 : 5 1/3

4 2/7 - 1 4/9 = 30/7 - 13/9 = (270 - 91) / 63 = 179 / 63 = 2целых 53/63
8 3/4 × 1 3/14 = 35/4 × 17/14 = 595 / 56 = 10,625
1 9/5 ÷ 5 1/3 = 14/5 ÷ 16/3 = 14/5 × 3/16 = 21 / 40 = 0,525