Помогите с решением!!!!!!!!!!!!!!!!

1.
$1)6 \div 100 = 0.06$
$2)9 \div 100 = 0.09 \\ 3)96 \div 100 = 0.96 \\ 4)76 \div 100 = 0.76$
$5)104 \div 100 = 1.04 \\ 6)167 \div 100 = 1.67$
$7)215 \div 100 = 2.15 \\ 8)185 \div 100 = 1.85$
2.

1)
$\frac{4}{7} \div \frac{2}{5} = \frac{4}{7} \times \frac{5}{2} = \frac{10}{7} = 1 \frac{3}{7}$
$\frac{3}{10} \times \frac{5}{6} = \frac{1}{10}$
$1 \frac{3}{7} + \frac{1}{10} = 1 \frac{30}{70} + \frac{7}{70} = 1 \frac{37}{70}$
2)
$\frac{7}{10} \times \frac{3}{14} = \frac{3}{20}$
$\frac{5}{12} \div \frac{1}{2} = \frac{5}{12} \times \frac{2}{1} = \frac{5}{6}$
$\frac{3}{20} + \frac{5}{6} = \frac{9}{60} + \frac{50}{60} = \frac{59}{60}$
3)
$14 \frac{2}{5} \div 1 \frac{1}{8} = \frac{72}{5} \div \frac{9}{8} = \\ \frac{72}{5} \times \frac{8}{9} = \frac{64}{5} = 12 \frac{4}{5} = 12.8$
$5 \frac{3}{7} \times 7 \frac{7}{20} = \frac{38}{7} \times \frac{147}{20} \\ = \frac{19 \times 21}{10} = \frac{399}{10} = 39 \frac{9}{10} = 39.9$
$12.8 + 39.9 = 52.7$
4)
$\frac{100}{9} \times \frac{189}{100} = 21$
$\frac{21}{5} \div \frac{35}{6} = \frac{21}{5} \times \frac{6}{35} \\ = \frac{3 \times 6}{5 \times 5} = \frac{18}{25}$
$21 - \frac{18}{25} = 20 \frac{25}{25} - \frac{18}{25} = 20 \frac{7}{25}$