Помогите пж срочно! плиииииз

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$4- \frac{5}{8} =3 \frac{8}{8} -\frac{5}{8} =3 \frac{3}{8}$
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$5- \frac{3}{5} =4 \frac{5}{5} - \frac{3}{5} =4 \frac{2}{5}$
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$3 \frac{3}{9} -2 \frac{5}{8}=3 \frac{3*8}{9*8}-2 \frac{5*9}{8*9}=3 \frac{24}{72}-2\frac{45}{72}=2 \frac{96}{72} -2 \frac{45}{72} =$
$= \frac{51}{72} = \frac{51:3}{72:3} = \frac{17}{24}$
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$8 \frac{5}{7} - 5\frac{9}{6} =8 \frac{5}{7} -6 \frac{3}{6} =8 \frac{5}{7} -6 \frac{3:3}{6:3}=8 \frac{5}{7} -6 \frac{1}{2}=$
$8 \frac{5*2}{7*2} -6 \frac{1*7}{2*7}=8 \frac{10}{14} -6 \frac{7}{14} =3 \frac{3}{14}$