Пж помогите с 52 Срочно

Решите задачу:

$1)\; \; 3 \frac{1}{16}-\frac{1}{8}=(2+\frac{16}{16}+\frac{1}{16})- \frac{2}{16}=(2+\frac{17}{16})-\frac{2}{16}=2 \frac{15}{16}$

$2)\; \; 7\frac{9}{20}-5\frac{17}{30}=7\frac{27}{60}-5\frac{34}{60}= 6\frac{87}{60}-5 \frac{34}{60}=1 \frac{53}{60}\\\\3)\; \; 4\frac{2}{7}-1\frac{4}{9}=(3+\frac{7}{7}+\frac{2}{7})-1\frac{4}{9}=3\frac{9}{7}-1\frac{4}{9}=3\frac{81}{63}-1\frac{28}{63}=2\frac{53}{63}$

$4)\; \; 8\frac{5}{36}-1\frac{43}{108}=(7+\frac{36}{36}+\frac{5}{36})-1\frac{43}{108}=7\frac{41}{36}-1 \frac{43}{108}=[\, 108=3\cdot 36]=\\\\=7\frac{123}{108}-1\frac{43}{108}=6\frac{80}{108}=6\frac{20}{27}$