Răspuns:
[tex]rezultat \: final \: : \frac{3}{5} \\ .................................. \\ \\ \frac{3}{28} \div \frac{1}{7} = \frac{3}{28} \times 7 = \frac{3}{4} \\ \\ = > \frac{3}{4} \times \frac{5}{6} = \frac{1}{4} \times \frac{5}{2} = \frac{5}{8} \\ \\ = > \frac{5}{8} \div \frac{15}{16} = \frac{5}{8} \times \frac{16}{15} = 5 \times \frac{2}{15} = \frac{2}{3} \\ \\ = > \frac{2}{3} \times \frac{9}{10} = 2 \times \frac{3}{10} = \frac{3}{5} [/tex]
