2/7 : 5/11 = 2/7 × 11/5 = 22/35.
2/5 : 3/4 = 2/5 × 4/3 = 8/15.
4/7 : 13/5 = 4/7 × 5/13 = 20/91.
6/7 : 19/5 = 6/7 × 5/19 = 30/133.
2/7 : 5/11 = 2/7 × 11/5 = 22/35.
2/5 : 3/4 = 2/5 × 4/3 = 8/15.
4/7 : 13/5 = 4/7 × 5/13 = 20/91.
6/7 : 19/5 = 6/7 × 5/19 = 30/133.