2*9=18 7*9=63 9 will go into both 18 and 63
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90
63 - 18 = 45
3 with remainder 9.
3 with remainder 9.
18
45 goes into 63 1.4 times or 1 with remainder 18.
The Lcm of 18 54 and 63 is: 378
63 = 189
The GCF is 9.
Seven of them because 63/9 = 7
45 - 63 = -18
18/63 = 2/7