Вычислите!!!помогите плиииз дам 30 баллов

Решите задачу:

$1 \frac{1}{7} = \frac{1*7+1}{7} = \frac{8}{7}$
$\frac{8}{7} - \frac{5}{7} = \frac{8-5}{7} = \frac{3}{7}$

$2 \frac{3}{11} = \frac{2*11+3}{11} = \frac{25}{11}$
$\frac{25}{11} - \frac{7}{11} = \frac{25-7}{11} = \frac{18}{11} =1 \frac{7}{11}$

$3 \frac{9}{17} = \frac{3*17+9}{17} = \frac{51+9}{17} = \frac{60}{17}$
$\frac{60}{17} - \frac{11}{17} = \frac{60-11}{17} = \frac{49}{17} =2 \frac{15}{17}$

$4 \frac{7}{27} = \frac{4*27+7}{27} = \frac{115}{27}$
$1 \frac{16}{27} = \frac{1*27+16}{27} = \frac{43}{27}$
$\frac{115}{27}- \frac{43}{27} = \frac{115-43}{27} = \frac{72}{27} =2 \frac{18}{27}$