42 * 6/7 = 36
2,4 : 3/8 = 24/10 : 3/8 = 12/5 * 8/3 = 24/5 = 48/10 = 4,8
1 5/7 : 6/7 = 12/7 : 6/7 = 12/7 * 7/6 = 2
2 1/4 * 4/9 = 9/4 * 4/9 = 1
8/15 : 2/5 = 8/15 * 5/2 = 4/3 = 1 1/3
5/7 * 1 2/5 = 5/7 * 7/5 = 1
2 4/5 : 1 2/5 = 14/5 : 7/5 = 14/5 : 5/7 = 2
3/4 * 2/9 = 6/36 = 1/6
1 1/2 : 0,3 = 1,5 : 0,3 = 5
6 : 2/3 = 6 * 3/2 = 6 : 1,5 = 4
1 2/7 : 2 1/3 = 9/7 : 7/3 = 9/7 * 3/7 = 27/49
7/8 : 1 5/16 = 7/8 : 21/16 = 7/8 * 16/21 = 2/3
2 1/7 * 0,7 = 9/7 * 7/10 = 9/10 = 0,9