Сократите дроби: 20/45; 12/72; 126/170; 21/108; 24/36; 15/35; 102/136; 90/126; 3/39; 36/63; 21/84; 151/302; 130/182; 490/560; 10/75.

Делим числитель и знаменатель каждой дроби на их наибольший общий делитель.

1. \(\frac{20}{45}=\frac{4}{9}\).
2. \(\frac{12}{72}=\frac{1}{6}\).
3. \(\frac{126}{170}=\frac{63}{85}\).
4. \(\frac{21}{108}=\frac{7}{36}\).
5. \(\frac{24}{36}=\frac{2}{3}\).
6. \(\frac{15}{35}=\frac{3}{7}\).
7. \(\frac{102}{136}=\frac{3}{4}\).
8. \(\frac{90}{126}=\frac{5}{7}\).
9. \(\frac{3}{39}=\frac{1}{13}\).
10. \(\frac{36}{63}=\frac{4}{7}\).
11. \(\frac{21}{84}=\frac{1}{4}\).
12. \(\frac{151}{302}=\frac{1}{2}\).
13. \(\frac{130}{182}=\frac{5}{7}\).
14. \(\frac{490}{560}=\frac{7}{8}\).
15. \(\frac{10}{75}=\frac{2}{15}\).