63% = 63/100
15*42/100 = 630/100 which can be simplified to 63/10 or 63/10
63/64 cannot be simplified further.
54/63 = 6/7 simplified
6/63 = 2/21 simplified
45/63 is 5/7 simplified
It is: 63/60 = 21/20 simplified
It is: 63/77 = 9/11 simplified
63/100= .63
41/63