5/12:7/18= (5/12)/(7/18)= (5/12)*(18/7)= 15/14
There are probably tens of such sets. Some are: 5, 6, 7, 7, 8, 11, 13, 14, 15, 16, 17, 18 5, 6, 7, 7, 7, 12, 12, 14, 15, 16, 17, 18 5, 6, 7, 7, 7, 12, 12, 14, 14, 16, 17, 18 5, 6, 7, 7, 7, 12, 12, 14, 14, 15, 17, 18 5, 6, 7, 7, 7, 12, 12, 14, 15, 15, 17, 18 5, 6, 7, 7, 7, 12, 12, 14, 15, 16, 16, 18 5, 6, 7, 7, 7, 12, 12, 14, 14, 16, 16, 18
5/6 / 7/18 = 5/6 * 18/7 = 15/7 =2 1/7
5/9 = 10/18 so, 5/9 > 7/18 ========
7/18 - 5/18 = 2/18 = 1/9
18/7 * 9/12 = 18/7 * 3/4 = (18*3)/(7/4) = 54/28 = 27/14
7/18 divided by 5/9 = 7/10 or 0.7
7/18 is bigger.
The ratio of 5 and 7 8 and 9 12 and 18 85 and 170 is 5:7/8:9/12:18/85:170.
(7 over 12) + (5 over 8) = 1.20833333
12/7 × 5/6 = 10/7 or 13/7
3/5 x 7/12 is 7/20
2/12 + 4/18 = 7/18