1). Сократите дроби: 16/20; 27/36; 60/72.

1. \(\frac{16}{20}=\frac{16:4}{20:4}=\frac45\).
2. \(\frac{27}{36}=\frac{27:9}{36:9}=\frac34\).
3. \(\frac{60}{72}=\frac{60:12}{72:12}=\frac56\).

Ответ: \(\frac45;\ \frac34;\ \frac56\).