a) $$1\frac{1}{7}$$ от 0,35
$$1\frac{1}{7} = \frac{8}{7}$$
0,35 = $$\frac{35}{100} = \frac{7}{20}$$
$$\frac{8}{7} \cdot \frac{7}{20} = \frac{8\cdot7}{7\cdot20} = \frac{56}{140} = \frac{2}{5} = 0,4$$
б) 0,24 от $$3\frac{1}{3}$$
$$3\frac{1}{3} = \frac{10}{3}$$
0,24 = $$\frac{24}{100} = \frac{6}{25}$$
$$\frac{6}{25} \cdot \frac{10}{3} = \frac{6\cdot10}{25\cdot3} = \frac{60}{75} = \frac{4}{5} = 0,8$$
Ответ: a) 0,4; б) 0,8