a) $$\frac{2}{7}$$ от 14 = $$\frac{2}{7} \times 14 = \frac{2 \times 14}{7} = \frac{28}{7} = 4$$.
б) $$\frac{5}{9}$$ от 48 = $$\frac{5}{9} \times 48 = \frac{5 \times 48}{9} = \frac{240}{9} = \frac{80}{3} = 26\frac{2}{3}$$.
в) $$\frac{9}{4}$$ от $$\frac{8}{27}$$ = $$\frac{9}{4} \times \frac{8}{27} = \frac{9 \times 8}{4 \times 27} = \frac{72}{108} = \frac{2}{3}$$.
г) $$\frac{4}{9}$$ от $$\frac{3}{16}$$ = $$\frac{4}{9} \times \frac{3}{16} = \frac{4 \times 3}{9 \times 16} = \frac{12}{144} = \frac{1}{12}$$.
Ответ:
a) 4
б) $$26\frac{2}{3}$$
в) $$\frac{2}{3}$$
г) $$\frac{1}{12}$$