3/8
12 over 91 can't be simplified.
It is: 12/5 times 5/8 = 60/40 = 3/2 simplified or as 1.5
12
14/24 = 7/12
8 over 9 (found by dividing the 96 and the 108 by 12)
8 over 20 simplified is 2 over 5
It is the same as: 8/12 plus 1/12 = 9/12 or as 3/4 simplified
12/4 = 12 ÷ 4 = 3
12 over 63 simplified = 4/21
8/11 is as simplified as it can get.
The simplified number of 24 over 12 is 2.