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8/63 is the answer
12 over 63 simplified = 4/21
It is: 63/60 = 21/20 simplified
63/64 cannot be simplified further.
It is: 63/77 = 9/11 simplified
45/63 is 5/7 simplified
6/63 = 2/21 simplified
54/63 = 6/7 simplified
280/315 = 56/63 = 8/9
The simplified fraction of 15 over 63 is 5/21
63/100= .63
8/63 is in its simplest form.
41/63