в) 1 15/29 • 1 9/20;

в) $$1\frac{15}{29} \cdot 1\frac{9}{20} = \frac{1 \cdot 29 + 15}{29} \cdot \frac{1 \cdot 20 + 9}{20} = \frac{29+15}{29} \cdot \frac{20+9}{20} = \frac{44}{29} \cdot \frac{29}{20} = \frac{44 \cdot 29}{29 \cdot 20} = \frac{11 \cancel{4} \cdot \cancel{29}}{\cancel{29} \cdot 5 \cancel{4} \cdot 1} = \frac{11}{5} = 2\frac{1}{5}$$

Ответ: $$2\frac{1}{5}$$