BEST ANSWER :
[tex]1 \frac{4}{5} \div \frac{2}{3} - 1 \frac{5}{7} [/tex]
=
[tex] \frac{7 + 4}{7} \div \frac{2}{3} - 1 \frac{5}{7} \\ \frac{11}{7} \div \frac{2}{3} - 1 \frac{5}{7} \\ \frac{11}{7} \div \frac{2}{3} - \frac{7 + 5}{7} \\ \frac{11}{7} \div \frac{2}{3} - \frac{12}{7} \\ \frac{11}{7} \times \frac{3}{2} - \frac{12}{7} \\ \frac{11 \times 3}{7 \times 2} - \frac{12}{7} \\ \frac{33}{7 \times 2} - \frac{12}{7} \\ \frac{33}{14} - \frac{12}{7} \\ \frac{33}{14} - \frac{12 \times 2}{14} \\ \frac{33}{14} - \frac{24}{14} \\ \frac{33 - 24}{14} \\ \frac{9}{14} [/tex]
