Сравните дроби: 2/6и5/21, 5/21и3/14, 7/15и8/9, 5/7и3/4.
2/6>5/21; 5/21>3/14; 7/15<8/9;<br>5/7<3/4.
5/21 5/21 7/15 5/7 вроде правильно