1/6 : 5/9 = 1/6 * 9/5 = 9/30 = 3/10

11.4/7 : 3.24 = 11.4/7 100/324 = 1140/700 100/324 = 228/81 = 76/27

Таким образом, отношения равны:
1/6 к 5/9 = 3/10
11.4/7 к 3.24 = 76/27