1/2 = 18/18 * 1/2 = 18/36,
2/6 = 6/6 * 2/6 = 12/36,
5/9 = 4/4 * 5/9 = 20/36,
1/12 = 3/3 * 1/12 = 3/36,
7/18 = 2/2 * 7/18 = 14/36
1/2 = 18/18 * 1/2 = 18/36,
2/6 = 6/6 * 2/6 = 12/36,
5/9 = 4/4 * 5/9 = 20/36,
1/12 = 3/3 * 1/12 = 3/36,
7/18 = 2/2 * 7/18 = 14/36