A) 4 2/3 * 3 2/3

Convert the mixed numbers to improper fractions:
4 2/3 = 14/3
3 2/3 = 11/3

Multiply the fractions:
(14/3) * (11/3) = 154/9

Convert the improper fraction back to a mixed number:
154/9 = 17 1/9

Therefore, 4 2/3 * 3 2/3 = 17 1/9

б) 3/8 - 4/5

Find a common denominator, which is 40:
3/8 = 15/40
4/5 = 32/40

Subtract the fractions:
15/40 - 32/40 = -17/40

Therefore, 3/8 - 4/5 = -17/40

в) 9/25 2 1/7 1 3/9

Convert the mixed numbers to improper fractions:
2 1/7 = 15/7
1 3/9 = 12/9 = 4/3

Multiply the fractions:
(9/25) (15/7) (4/3) = 540/525 = 36/35

Convert the improper fraction back to a mixed number:
36/35 = 1 1/35

Therefore, 9/25 2 1/7 1 3/9 = 1 1/35