The common factors of 63 and 108 are 1, 3 and 9.
The common factors of 45 and 63 are 1, 3, and 9.
9 45 = 9*5, 63 = 9*7 and 108 = 9*12
The greatest common factor of 45 and 63 is 9.
The GCF is 9.
9
1, 3 and 9
13
1, 3 and 9
The highest common factor is 9
The highest common factor is 9
108 ÷ 63 = 1 with remainder 45